CN107138016A - Based on many particulate matter coalescence reunion intensifying devices promoted and method - Google Patents
Based on many particulate matter coalescence reunion intensifying devices promoted and method Download PDFInfo
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- CN107138016A CN107138016A CN201710316895.3A CN201710316895A CN107138016A CN 107138016 A CN107138016 A CN 107138016A CN 201710316895 A CN201710316895 A CN 201710316895A CN 107138016 A CN107138016 A CN 107138016A
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- 238000004581 coalescence Methods 0.000 title claims abstract description 78
- 239000013618 particulate matter Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 119
- 239000003546 flue gas Substances 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000007921 spray Substances 0.000 claims abstract description 32
- 230000000694 effects Effects 0.000 claims abstract description 30
- 230000015271 coagulation Effects 0.000 claims abstract description 24
- 238000005345 coagulation Methods 0.000 claims abstract description 24
- 150000002500 ions Chemical class 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000009833 condensation Methods 0.000 claims abstract description 14
- 230000005494 condensation Effects 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 9
- 230000008676 import Effects 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 238000005054 agglomeration Methods 0.000 claims description 9
- 230000002776 aggregation Effects 0.000 claims description 9
- 241001061906 Caragana Species 0.000 claims description 7
- 241000607479 Yersinia pestis Species 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 14
- 230000005684 electric field Effects 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 239000008187 granular material Substances 0.000 abstract description 5
- 238000005411 Van der Waals force Methods 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000005686 electrostatic field Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrostatic Separation (AREA)
Abstract
The present invention relates to a kind of based on many particulate matter coalescence reunion intensifying devices promoted and method, heat exchange cooling condenser, the orifice-plate type coagulation that ion wind is assisted and system and coalescence blender are sequentially arranged in knockouts, the orifice-plate type coagulation and system that ion wind is assisted include anode, orifice-plate type pole plate and negative electrode, anode and negative electrode are separately positioned between two adjacent orifice-plate type pole plates, spray humidifier is additionally provided with before or after orifice-plate type coagulation and system, spray humidifier includes some nozzles, and nozzle is connected with drop generating device.The present invention combines phase transformation condensation and spray humidification is grown up, simultaneously particles collision coalescence probability is improved using the effect of electric cleaner intermediate ion wind stream field, many field action reinforcing particle coalescence agglomerating effects such as viscous force such as comprehensive electric field force, liquid bridge power, Van der Waals force in same equipment, significantly increase mean particle size, it is the effective ways of granular material discharged concentration in the further removal effect for improving cleaner, reduction flue gas.
Description
Technical field
The invention belongs to the industrial flue gas cleaning field such as coal-burning power plant, and in particular to a kind of particulate matter based on many promotions
Coalescence reunion intensifying device and method.
Background technology
With industrial expansion, the atmosphere polluting problem that China faces at present is increasingly serious, wherein granular material discharged cause
Haze phenomenon cause extensive attention, its concentration is important atmosphere pollution index.The industrial emission sources such as coal-burning power plant are for we
State fine grained (PM2.5) one of main source, PM2.5It is small volume, lightweight, can constantly be spread with air motion and it is long when
Between stop, to human habitat and it is healthy cause long lasting effect, therefore further strengthen the industrial sources such as coal-burning power plant
Grain thing especially fine grained (PM2.5) removing it is very urgent.
Electrostatic precipitator is one of common method that Atmospheric particulates are administered, it applied in coal-burning power plant in efficiency of dust collection
Up to 99.99%, suitable with fluid drag yet with submicron particles carrying capacity, migration rate in the electric field is low, right
The particulate removal effect of submicron order is not ideal enough.Particle can be due to the viscosity between particle during motion and collision
Power (electric field force, Van der Waals force, liquid bridge power etc.) acts on and occurs coalescence and reunion, is attached to the little particle migration speed on bulky grain
Rate and removal effect can all be significantly improved.Therefore, the small size particle number concentration reduction after coalescence, mean particle size increases
Greatly.The particulate matter coalescence agglomeration device of electrostatic dust collection equipment upstream is arranged in, submicron order little particle is produced and reunites and adhere to
On bulky grain, movement rate and removal effect of the particle in granule capturing device can be effectively improved.
Currently for particle coalescence agglomeration techniques, have and utilize the electricity that attraction collision is produced between the particle with different electric charges
Coalescence, shake in sound wave using different sized particles sound coalescence and sprayed using chemical agglomeration agent in cigarette that collision produces
Absorbing particles and increase the methods such as sticky chemical agglomeration between particle in gas, but effect is not enough managed during these method independent roles
Think.The present invention traditional coagulation and on the basis of, grown up with reference to phase transformation condensation and spray humidification, at the same using in electric cleaner from
The effect of sub- wind stream field improves particles collision coalescence probability, comprehensive electric field force, liquid bridge power, Van der Waals force etc. in same equipment
Many field action reinforcing particle coalescence agglomerating effects such as viscous force, significantly increase mean particle size, are further raising dedustings
The effective ways of granular material discharged concentration in the removal effect of equipment, reduction flue gas.
The content of the invention
It is an object of the invention to provide the apparatus and method that a kind of many field action reinforcing particle coalescences are reunited, the device energy
Enough effectively reduction PM1.0The number concentration 40~50% of (particle of the diameter below 1.0 μm), raising average diameter of particles 30~
More than 45%, so as to lift the particulate matter removing efficiency of traditional cleaner, realize that many coalescence devices are combined with cleaner
Particulate emission concentration is reduced to 1mg/m3Below.
In order to realize above-mentioned functions, the technical solution adopted by the present invention is：
A kind of particulate matter coalescence reunion intensifying device based on many promotions, described device includes knockouts, along knockouts
Import is sequentially arranged heat exchange cooling condenser, the orifice-plate type that ion wind is assisted to knockouts Way out in the knockouts
Coagulation and system and coalescence blender, the orifice-plate type coagulation and system that the ion wind is assisted include anode, orifice-plate type pole plate and
Negative electrode, the anode, orifice-plate type pole plate and negative electrode are set each parallel to flue gas flow direction, and anode and negative electrode are separately positioned on two phases
Between adjacent orifice-plate type pole plate, and at least one orifice-plate type pole plate between anode and negative electrode, the anode is connected with positive supply,
Negative electrode is connected with negative supply；Spray humidifier is additionally provided with the knockouts, the spray humidifier is arranged on ion wind assistance
Orifice-plate type coagulation and system before or after；The spray humidifier includes some nozzles, and the nozzle is parallel to flue gas stream
To, and be disposed side by side in knockouts, the nozzle is connected with drop generating device.
Preferably, along the direction perpendicular to flue gas flow direction, anode, orifice-plate type pole plate and negative electrode are arranged side by side.
Preferably, the orifice-plate type pole plate percent opening is 10%~20%.Orifice plate percent opening more than 20% can be to difference
The electric discharge of interchannel and flowing field stability produce influence.
Preferably, the outlet of coalescence knockouts is connected with electric cleaner import.
Preferably, coalescence blender is using 30~60 ° of diagonal formula blades, the nozzle uses two-fluid spray nozzle.
Using 30~60 ° of diagonal formula blades, flue gas is produced eddy flow, promote the mixing and collision of different channel particulates；Using double
Fluid tip sprays droplet into flue gas, the humidity in further increasing flue gas on the basis of condensation, promotes particle surface shape
Into liquid film, charging particle amount is further improved, and can increase the liquid bridge power that capillarity is produced between particle, so as to greatly increase
Intergranular viscous force, promotes particle agglomeration.In addition, by controlling arrangement of nozzles, flow to control, preventing fouling in flue.
Coalescence blender blade can use stainless steel or PVC materials, make it have firm wear-and corrosion-resistant corrosion.Particle is solidifying
And after being sufficiently mixed in blender further coagulation and, reunite grow up, be conducive to enter electrostatic precipitator after removal efficiency
Raising.
Desulfurization wastewater, chemical addition agent etc. may be selected in spray humidifier of the present invention, utilizes the effect of liquid bridge power and chemical bond
Increase viscous force between particle, reinforcing particle coalescence agglomerating effect, and realize desulfurization wastewater, SO3Deng pollutant cooperation-removal.
Preferably, the positive supply is fundamental wave superimposed pulse positive supply or high frequency electric source positive supply, negative supply is fundamental wave
Superimposed pulse negative supply or high frequency electric source negative supply；Negative electrode uses stainless steel, using fish-bone line or prickle wire.
High voltage power supply, the high-field electrode for being connected to coagulation and region, carries out coalescence passage corona discharge.High voltage power supply
The high frequency electric source of energy-saving type high stability can be used, positive supply and the different cigarettes of negative supply connection is respectively adopted in adjacent charged passage
Gas passage, makes particle polarity heteropolarity charged, makes the particles collision coalescence of different charged polarity.In addition, power supply can also be used
New and effective fundamental wave superimposed pulse power supply, can further increase ion concentration and electric-field intensity, make the increase of charging particle amount.
High voltage discharge electrode uses stainless steel, using many discharge tip line styles such as fish-bone line, prickle wire, is put so as to strengthen
Electric effect.Different passages are separated using orifice-plate type pole plate between different discharge channels, the ion wind produced using surrounding them is pushed away
Dynamic particle moves to pole plate direction and passes through orifice plate to realize with the pre- coalescence of positive and negative conductive particles.
A kind of particulate matter coalescence reunion intensifying method based on many promotions, using said apparatus, comprises the steps：
(1) flue gas enters knockouts from knockouts import, first passes around in heat exchange cooling condenser cooling condensation, flue gas
Moisture and SO3Condense and assemble in surface particles, increase grain diameter, and dielectric constant increases, charge capacity enhancing；
(2) then flue gas passes through spray humidifier, and the water smoke that nozzle is ejected, further with Interaction between particles, increases
Smoke moisture, promotes particle agglomeration；
(3) the orifice-plate type coagulation and system for being arranged in the assistance of the ion wind after spray humidifier are multi-passage design, each
Passage intermediate arrangement high-field electrode, electrode connection high voltage power supply carry out corona discharge, particle enter coagulation and system it is charged after, by
Moved in ion wind action to orifice-plate type pole plate, perforate of the partial particulate on the orifice-plate type pole plate through passage with it is adjacent
The particles collision of the oppositely charged of passage, promotes particle Caragana seed pests；
(4) last flue gas enters coalescence blender, because the blade effect in coalescence blender produces eddy flow, different passages
Between flue gas fully disturb and mix, the particle with positive and negative electric charge is sufficiently mixed and is collided, promote particle Caragana seed pests.
Preferably, described device be arranged in flue or deduster import at.For particulate matter pre electrified in flue gas and
Coalescence, reunion are grown up.
Preferably, described reduce flue-gas temperature between 100 DEG C~80 DEG C by heat exchange cooling condenser.Heat exchange cooling
The heat that condenser is used in recovered flue gas, makes the moisture and SO in flue gas3Particle surface is condensed in Deng composition, particle is improved and exists
Polarizability and dielectric constant in electrostatic field, so as to significantly improve charging particle amount；In addition, Drop Condensation is in particle surface,
Viscous force between particle can be improved during particles collision, promotes particle coalescence to reunite；Moreover, particle ratio resistance after flue gas cool-down
Also it can reduce, reduce the removing of particle back corona phenomenon, more conducively particle in deduster.
Preferably, the orifice-plate type pole plate percent opening is 10%~20%, coalescence blender is using 30~60 ° to angle lapping
Inclined blade, the nozzle uses two-fluid spray nozzle.
The present invention combines electric field (the charged coalescence of particle heteropolarity), temperature field (flue gas heat exchange cooling condensation), moisture field
(SO3, the condensation growth such as moisture), flow field (promoting different interchannel particles collision coalescences using ion wind), multiphase flow action (liquid
Drop, chemical addition agent, the reunion of particle are grown up) etc. a variety of effects, promote fine particle Caragana seed pests while realize SO3, it is de-
The Collaborative Control emission reduction of the multiple pollutants such as sulphur waste water.
The present invention traditional coagulation and on the basis of, grown up with reference to phase transformation condensation and spray humidification, while utilizing electric precipitation
The effect of device intermediate ion wind stream field improves particles collision coalescence probability, comprehensive electric field force, liquid bridge power, Fan De in same equipment
Many field action reinforcing particle coalescence agglomerating effects such as the viscous forces such as magnificent power, significantly increase mean particle size, are further to carry
The effective ways of granular material discharged concentration in the removal effect of high cleaner, reduction flue gas.
Brief description of the drawings
Fig. 1 is the structural representation of the particulate matter coalescence reunion intensifying device based on many promotions of the embodiment of the present invention 1；
Fig. 2 is the structural representation of orifice-plate type pole plate of the present invention；
Fig. 3 is the structural representation of the particulate matter coalescence reunion intensifying device based on many promotions of the embodiment of the present invention 3.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but invention which is intended to be protected is simultaneously
Not limited to this.
Embodiment 1
A kind of reference picture 1, Fig. 2, particulate matter coalescence reunion intensifying device based on many promotions, described device includes cohesion
Device 1, exports along knockouts import 8 to knockouts and heat exchange cooling condenser 13, spray has been sequentially arranged in 6 directions, the knockouts
Orifice-plate type coagulation and system and coalescence blender 5 that mist humidifier, ion wind are assisted, coalescence knockouts outlet 6 and electric cleaner 7
Import is connected.The orifice-plate type coagulation and system that the ion wind is assisted include anode 3, orifice-plate type pole plate 4 and negative electrode 9, described
Anode 3, orifice-plate type pole plate 4 and negative electrode 9 are set each parallel to flue gas flow direction, anode 3 and negative electrode 9 be separately positioned on two it is adjacent
Between orifice-plate type pole plate, along perpendicular to the direction of flue gas flow direction, anode 3, orifice-plate type pole plate 4 and negative electrode 9 are arranged side by side.The sun
Pole 3 is connected with new and effective fundamental wave superimposed pulse positive supply 2, and negative electrode 9 is connected with new and effective fundamental wave superimposed pulse negative supply 10；
The spray humidifier includes some nozzles 11, and the nozzle is disposed side by side in knockouts parallel to flue gas flow direction, described
Nozzle 11 is connected with drop generating device 12.The nozzle 11 uses two-fluid spray nozzle, using two-fluid spray nozzle into flue gas
Droplet is sprayed, the humidity in further increasing flue gas on the basis of condensation promotes particle surface formation liquid film, further improved
Charging particle amount, and can increase the liquid bridge power that capillarity is produced between particle, so as to greatly increase viscous force between particle, promotes
Grain is reunited.Furthermore, it is possible to by controlling arrangement of nozzles, flow to control, prevent fouling in flue.
Some through holes 14 are offered on the orifice-plate type pole plate 4, percent opening is 15%, coalescence blender 5 is diagonal using 45 °
Tilting blade, makes flue gas produce eddy flow, promotes the mixing and collision of different channel particulates, coalescence blender blade is using stainless
Steel matter.Particle be sufficiently mixed in coalescence blender after further coagulation and, reunite grow up, be conducive to removing into electrostatic
The raising of removal efficiency after dirt device.
Desulfurization wastewater, chemical addition agent etc. may be selected in spray humidifier of the present invention, utilizes the effect of liquid bridge power and chemical bond
Increase viscous force between particle, reinforcing particle coalescence agglomerating effect, and realize desulfurization wastewater, SO3Deng pollutant cooperation-removal.This hair
Bright high voltage discharge electrode uses stainless steel, using many discharge tip line styles such as fish-bone line, prickle wire, so that enhanced discharge is imitated
Really, different passages are separated using orifice-plate type pole plate between different discharge channels, the ion wind promotion produced using surrounding them
Grain moves to pole plate direction and passes through orifice plate to realize with the pre- coalescence of positive and negative conductive particles.
The present invention can be by controlling the flow velocity and flow of cooling water, to cause the gas at heat exchange cooling condenser 13
Temperature, to reach optimal cooling coalescence effect, is conducive to follow-up dust removal step close to and above the dew-point temperature of the gas.
The dew-point temperature of flue gas is related to the composition of flue gas, can be obtained by calculating or surveying.
The present invention operation principle be：Flue gas of the present invention cools by heat exchange cooling condenser 13, gas, the water in flue gas
Divide and SO3Particle surface is condensed in Deng material, polarizability and dielectric constant of the particle in electrostatic field are improved, so as to substantially carry
Electric field force between high charging particle amount and particle；Droplet is produced by drop generating device 12 again, two-fluid spray nozzle 11 sprays into cigarette
In gas, flue gas humidification is given, particle is absorbed moisture formation liquid film, particle polarizability and carrying capacity, increase can be significantly improved
The liquid bridge power that intergranular capillarity is produced, so as to greatly increase viscous force between particle, promotes particle agglomeration；Pass through the He of anode 3 again
The negative corona passage between positive corona passage and negative electrode 9 and orifice-plate type pole plate 4 between orifice-plate type pole plate 4, forms band respectively
Different passages are separated using orifice-plate type pole plate between positive electricity dust and negatively charged dust, different discharge channels, surrounding them is utilized
The ion wind of generation promotes particle to be moved to pole plate direction and passes through orifice plate to realize with the pre- coalescence of positive and negative conductive particles；Positively charged
After dust and negatively charged dust are respectively away from positive corona passage and negative corona passage, into coalescence blender 5, it is mutually mixed, coagulates
It is polymerized to larger particles dust.
The present apparatus is tested in the lab, and test result shows, flue gas passes through the present apparatus, PM1.0Number concentration subtract
Lack 50%, the median particle diameter of particle improves 45%, 1mg/m is reduced to cleaner combination concentration of emission3Below.
Embodiment 2
Reference picture 1, Fig. 2, a kind of particulate matter coalescence reunion intensifying method based on many promotions, using the device of embodiment 1,
Comprise the steps：
(1) flue gas enters knockouts 1 from knockouts import 8, first passes around the heat exchange cooling cooling condensation of condenser 13, flue gas
In moisture and SO3Condense and assemble in surface particles, increase grain diameter, and dielectric constant increases, charge capacity enhancing；
It is described to reduce flue-gas temperature between 100 DEG C~80 DEG C by heat exchange cooling condenser 13, heat exchange cooling condenser
For the heat in recovered flue gas, make the moisture and SO in flue gas3Particle surface is condensed in Deng composition, particle is improved in electrostatic field
In polarizability and dielectric constant, so as to significantly improve charging particle amount；In addition, Drop Condensation is in particle surface, in particle
Viscous force between particle can be improved in collision process, promotes particle coalescence to reunite；Moreover, particle ratio resistance can also drop after flue gas cool-down
It is low, reduce the removing of particle back corona phenomenon, more conducively particle in deduster；
(2) then flue gas passes through spray humidifier, the water smoke that two-fluid spray nozzle 11 is ejected, further with particle phase interaction
With increase smoke moisture promotes particle agglomeration；
(3) the orifice-plate type coagulation and system for being arranged in the assistance of the ion wind after spray humidifier are multi-passage design, each
Passage intermediate arrangement high-field electrode, electrode connection high voltage power supply carry out corona discharge, particle enter coagulation and system it is charged after, by
Moved in ion wind action to orifice-plate type pole plate, through hole 14 and phase of the partial particulate on the orifice-plate type pole plate through passage
The particles collision of the oppositely charged of adjacent passage, promotes particle Caragana seed pests；
(4) last flue gas enters coalescence blender 5, and because the blade effect in coalescence blender produces eddy flow, difference is logical
Flue gas between road is fully disturbed and mixed, and the particle with positive and negative electric charge is sufficiently mixed and is collided, and promotes particle coalescence long
Greatly.During coalescence, the drop condensed with adsorbing in particle surface can be charged with reinforcing particle, improves the coulomb between particle
Power, additionally, due to the effect of liquid bridge power, the viscous force between the particle of collision rift is also significantly increased, and makes to be difficult after particles collision point
From, hence it is evident that increase coalescence effect.
In order to ensure more preferable coagulation and effect, new and effective fundamental wave superimposed pulse positive supply can be adjusted as needed
2 with the voltage of new and effective fundamental wave superimposed pulse negative supply 10, to change the degree of ionization in electric field.When dust removing effects are less than pre-
Calibration is punctual, raises the voltage of high voltage power supply, when dust removing effects are higher than predetermined standard time, reduces the voltage of high voltage power supply.
The present invention is used for particulate matter pre electrified and coalescence, reunion in flue gas and grown up.The present invention combines electric field (particle heteropolarity
Charged coalescence), temperature field (flue gas heat exchange cooling condensation), moisture field (SO3, the condensation growth such as moisture), flow field (utilize ion wind
Promote different interchannel particles collision coalescences), multiphase flow action (drop, chemical addition agent, the reunion of particle are grown up) etc. it is a variety of
Effect, promotes to realize SO while fine particle Caragana seed pests3, the multiple pollutant such as desulfurization wastewater Collaborative Control emission reduction.This
Invention each several part is worked in coordination, coordinative role, common guarantee coalescence agglomerating effect.
Embodiment 3
Reference picture 3, spray humidifier 5 is arranged on after the orifice-plate type coagulation of ion wind assistance and system, other references
Embodiment 1.
The present apparatus is tested (test condition such as embodiment 1) in the lab, and test result shows, flue gas passes through this dress
Put, PM1.0Number concentration reduce 42%, the median particle diameter of particle improves 35%, with cleaner combination concentration of emission drop
As little as 8mg/m3Below.
Embodiment 4
Orifice-plate type pole plate percent opening is 20%, and coalescence blender is using 60 ° of diagonal formula blades, and other are with reference to embodiment
1。
The present apparatus is tested (test condition such as embodiment 1) in the lab, and test result shows, flue gas passes through this dress
Put, PM1.0Number concentration reduce 40%, the median particle diameter of particle improves 30%, with cleaner combination concentration of emission drop
As little as 10mg/m3Below.
Embodiment 4
Orifice-plate type pole plate percent opening is 10%, and coalescence blender is using 30 ° of diagonal formula blades, and other are with reference to embodiment
1。
The present apparatus is tested (test condition such as embodiment 1) in the lab, and test result shows, flue gas passes through this dress
Put, PM1.0Number concentration reduce 45%, the median particle diameter of particle improves 40%, with cleaner combination concentration of emission drop
As little as 5mg/m3Below.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (10)
1. a kind of particulate matter coalescence reunion intensifying device based on many promotions, it is characterised in that：Described device includes knockouts,
Along knockouts import to knockouts Way out, heat exchange cooling condenser, ion wind are sequentially arranged in the knockouts and has been assisted
Orifice-plate type coagulation and system and coalescence blender, the orifice-plate type coagulation and system that the ion wind is assisted include anode, orifice plate
Formula pole plate and negative electrode, the anode, orifice-plate type pole plate and negative electrode are set each parallel to flue gas flow direction, and anode and negative electrode are set respectively
Between two adjacent orifice-plate type pole plates, and at least one orifice-plate type pole plate between anode and negative electrode, the anode with just
Power supply is connected, and negative electrode is connected with negative supply；Be additionally provided with spray humidifier in the knockouts, the spray humidifier be arranged on from
Before or after orifice-plate type coagulation and system that sub- wind is assisted；The spray humidifier includes some nozzles, and the nozzle is parallel
In flue gas flow direction, and it is disposed side by side in knockouts, the nozzle is connected with drop generating device.
2. the particulate matter coalescence reunion intensifying device according to claim 1 based on many promotions, it is characterised in that：Hang down on edge
Directly in the direction of flue gas flow direction, anode, orifice-plate type pole plate and negative electrode are arranged side by side.
3. the particulate matter coalescence reunion intensifying device according to claim 1 based on many promotions, it is characterised in that：It is described
Orifice-plate type pole plate percent opening is 10%~20%.
4. the particulate matter coalescence reunion intensifying device according to claim 1 based on many promotions, it is characterised in that：Coalescence
Knockouts outlet is connected with electric cleaner import.
5. the particulate matter coalescence reunion intensifying device according to claim 1 based on many promotions, it is characterised in that：Coalescence
Blender uses two-fluid spray nozzle using 30~60 ° of diagonal formula blades, the nozzle.
6. the particulate matter coalescence reunion intensifying device according to claim 1 based on many promotions, it is characterised in that：It is described
Positive supply is fundamental wave superimposed pulse positive supply or high frequency electric source positive supply, and negative supply is fundamental wave superimposed pulse negative supply or high-frequency electrical
Source negative supply；Negative electrode uses stainless steel, using fish-bone line or prickle wire.
7. a kind of particulate matter coalescence reunion intensifying method based on many promotions, it is characterised in that：Filled using described in claim 1
Put, comprise the steps：
(1) flue gas enters knockouts from knockouts import, first passes around the moisture in heat exchange cooling condenser cooling condensation, flue gas
And SO3Condense and assemble in surface particles, increase grain diameter, and dielectric constant increases, charge capacity enhancing；
(2) then flue gas passes through spray humidifier, and the water smoke that nozzle is ejected, further with Interaction between particles, increases flue gas
Humidity, promotes particle agglomeration；
(3) the orifice-plate type coagulation and system for being arranged in the assistance of the ion wind after spray humidifier are multi-passage design, each passage
Intermediate arrangement high-field electrode, electrode connection high voltage power supply carry out corona discharge, particle enter coagulation and system it is charged after, due to from
Sub- wind action is moved to orifice-plate type pole plate, perforate and adjacency channel of the partial particulate on the orifice-plate type pole plate through passage
Oppositely charged particles collision, promote particle Caragana seed pests；
(4) last flue gas enters coalescence blender, because the blade effect in coalescence blender is produced between eddy flow, different passages
Flue gas fully disturb and mix, the particle with positive and negative electric charge is sufficiently mixed and is collided, promote particle Caragana seed pests.
8. the particulate matter coalescence reunion intensifying method according to claim 7 based on many promotions, it is characterised in that：It is described
Device be arranged in flue or deduster import at.
9. the particulate matter coalescence reunion intensifying method according to claim 7 based on many promotions, it is characterised in that：It is described
Flue-gas temperature is reduced between 100 DEG C~80 DEG C by heat exchange cooling condenser.
10. the particulate matter coalescence reunion intensifying method according to claim 7 based on many promotions, it is characterised in that：Institute
It is 10%~20% to state orifice-plate type pole plate percent opening, and coalescence blender is adopted using 30~60 ° of diagonal formula blades, the nozzle
Use two-fluid spray nozzle.
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