CN103768886B - Efficient multi-field-coordination fine particulate matter removal device and method - Google Patents

Efficient multi-field-coordination fine particulate matter removal device and method Download PDF

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CN103768886B
CN103768886B CN201410032778.0A CN201410032778A CN103768886B CN 103768886 B CN103768886 B CN 103768886B CN 201410032778 A CN201410032778 A CN 201410032778A CN 103768886 B CN103768886 B CN 103768886B
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electrode
particle
teflon insulation
direct current
pulse
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CN103768886A (en
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骆仲泱
江建平
陈浩
方梦祥
王涛
郑成航
施正伦
倪明江
岑可法
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor

Abstract

The invention discloses an efficient multi-field-coordination fine particulate matter removal device and an efficient multi-field-coordination fine particulate matter removal method. The device comprises an outer field coagulation area, a direct current dust pre-collecting area, a pulse charge coagulation area and a direct current dust collecting area which are connected in sequence, wherein water steam and a chemical agglomeration agent are introduced from a nozzle of the outer field coagulation area respectively; the direct current dust pre-collecting area and the direct current dust collecting area are arranged in a line-plate type symmetric structure, a line electrode applies negative direct current high voltage, and a plate electrode is grounded and adopts layout of a water film electrode; the pulse charge coagulation area is arranged in the line-plate type symmetric structure, the line electrode applies positive pulse high voltage, and the plate electrode is grounded and adopts layout of the water film electrode. The device and the method aim at mineral particulate matters discharged by a fixed source; aerosol particulate matters, particularly fine particulate matters, can be subjected to efficient coagulation removal in a structural form of double coagulation areas and double dust collecting areas by using a multi-field-coordination method combined by a phase-change coagulation growth technology, a chemical agglomeration and flocculation mechanism and an electric coagulation technology, so that the phenomena of back corona, re-entrainment of dust, ash deposition and corrosion of the plate electrode are effectively avoided.

Description

Many field coordination fine particle efficient removal devices and methods therefor
Technical field
The present invention relates to particle dust arrester, particularly relate to a kind of many field coordination fine particle efficient removal devices and methods therefor.
Background technology
The country of China's to be one with fire coal be main energy sources, coal burning is while providing thermal source and power for us, also serious Particulate Pollution is brought, in the source of fine particle, discharged from coal-fired boiler occupies greatly, particularly at the widely used mediumand smallscale industrial boilers of every profession and trade and Industrial Stoves, owing to lacking corresponding environment protection control equipment, pollute particularly serious.Aerosol particle thing, particularly fine particle PM 2.5, daily life and work can be had a strong impact on after being discharged in air, even threaten the life security of people.Because the volume of fine particle is little, lightweight, therefore atmospheric residence time is long, and floating distance, coverage is wide.And due to the photoextinction of its uniqueness, can the serious visibility reducing environment, cause large area haze weather, affect people and normally go on a journey.In addition, the specific area of fine particle is larger, a large amount of poisonous and hazardous heavy metal can be enriched in its surface, and the blocking capability of human body to fine particle limitedly causes fine particle can enter human respiratory tract, is deposited in alveolar, heavy metal wherein can enter blood of human body, cause the disease of asthma, bronchus and the aspect such as cardiovascular, be detrimental to health.
Most of coal-fired power station boiler employing electrostatic precipitator (ESP) of current China removes the particle in tail flue gas.Efficient electrostatic precipitator efficiency of dust collection can up to 99.7%, but for fine particle, especially particle diameter is at the particle of 0.1 micron to 1.0 microns, and the ratio still having about 15% escapes into air.Therefore consider before electrostatic precipitator, add the pre-agglomeration device of fine particle, allow fine particle first reunite under the effect of physics or chemistry and grow up into the particle of greater particle size, then collected by electrostatic precipitator.The method of agglomeration studied at present comprises: electricity reunion, acoustic agglomeration, phase transformation condensation growth and chemical agglomeration etc., but there is certain drawback during these method of agglomeration independent roles, not clearly to the agglomerating effect of fine particle, so final fine particle removal efficiency can not effectively improve.
Therefore, develop a kind of novel fine particle efficient removal device based on many field coordination method very necessary, outfield coalescence and the charged coalescence of pulse are effectively combined, fine particle is reunited under the effect of the multi-acting forces such as electric field force, thermophoretic forces, liquid bridge power and solid bridge power and grows up into the particle of greater particle size, realize efficient removal eventually through electrostatic precipitator technology.
Summary of the invention
The object of the invention is to overcome the existing dust arrester of coal fired power plant to the deficiency of fine particle removal effect, a kind of many field coordination fine particle efficient removal devices and methods therefor is provided.This fine particle removing device can for the mineral particle thing of stationary source discharge, adopt the version of Jia Shuan dust collection section, two coalescence district, by the phase transformation condensation growth technology in coalescence district, outfield and the electric coagulating technique in chemical agglomeration Flocculating mechanism and pulse charged coalescence district, promote that the efficient reunion of fine particle is grown up, efficient removal is realized eventually through two direct currents region of gathering dust, especially the efficient coalescence of fine particle removes, and effectively avoids plate electrode inverse corona, reentrainment of dust, dust stratification and corrosion.
Many field coordination fine particle efficient removal device comprises the import of aerosol particle thing, air distribution plate, coalescence district, outfield, the pre-dust collection section of direct current, the charged coalescence district of pulse, direct current dust collection section, aerosol outlet, nozzle, steam and chemical agglomeration agent access pipeline, teflon insulation, the sub-water string of teflon insulation, ash bucket serum outlet, negative dc high voltage electric wire, positive pulse high-tension bus-bar, line electrode, ash bucket, moisture film electrode external water source access pipeline, tank, baffle plate, plate electrode, the import of described aerosol particle thing, air distribution plate, coalescence district, outfield, the pre-dust collection section of direct current, the charged coalescence district of pulse, direct current dust collection section, aerosol outlet are connected in turn, coalescence district, described outfield comprises nozzle, steam and chemical agglomeration agent access pipeline, ash bucket serum outlet, ash bucket, described nozzle adopts pressure rotating nozzle, and be arranged in directly over runner middle and ash bucket, flow path direction is just carried out to aerosol in jet expansion direction, and nozzle accesses pipeline with the steam and chemical agglomeration agent that are fixed on top, coalescence district, outfield and is connected, the pre-dust collection section of described direct current and direct current dust collection section adopt identical line plank frame to arrange, wherein the pre-dust collection section of direct current comprises teflon insulation, the sub-water string of teflon insulation, ash bucket serum outlet, negative dc high voltage electric wire, line electrode, ash bucket, moisture film electrode external water source access pipeline, tank, baffle plate, plate electrode, top, direct current pre-dust collection section is provided with multiple teflon insulation, the sub-water string of teflon insulation is provided with outside teflon insulation, teflon insulation is inserted with line electrode, line electrode is connected with negative dc high voltage electric wire, both sides, top, direct current pre-dust collection section are provided with moisture film electrode external water source access pipeline, tank, baffle plate, direct current pre-dust collection section two madial wall is provided with plate electrode, plate electrode ground connection, bottom, direct current pre-dust collection section is provided with ash bucket, hopper bottom is provided with ash bucket serum outlet, the charged coalescence district of described pulse adopts line plank frame to arrange, comprise teflon insulation, the sub-water string of teflon insulation, ash bucket serum outlet, positive pulse high-tension bus-bar, line electrode, ash bucket, moisture film electrode external water source access pipeline, tank, baffle plate, plate electrode, top, pulse charged coalescence district is provided with multiple teflon insulation, the sub-water string of teflon insulation is provided with outside teflon insulation, teflon insulation is inserted with line electrode, line electrode is connected with positive pulse high-tension bus-bar, both sides, top, pulse charged coalescence district are provided with moisture film electrode external water source access pipeline, tank, baffle plate, pulse charged coalescence district two madial wall is provided with plate electrode, bottom, pulse charged coalescence district is provided with ash bucket, hopper bottom is provided with ash bucket serum outlet.
Described line electrode adopts stainless steel material, vertically be arranged side by side along runner center line, end flushes with ash bucket top edge, and the sub-lower limb of described teflon insulation stretches in the sub-water string of teflon insulation, and lower than the height of the sub-water string lower limb of teflon insulation.Described plate electrode adopts stainless steel material, is vertically arranged in runner both sides, forms moisture film electrode structure.
Many field coordination fine particle efficient removal method is: aerosol particle thing is evenly distributed and enters coalescence district, outfield after the import of aerosol particle thing, air distribution plate, by outfield coalescence method under the effect of steam and chemical agglomeration agent, fine particle is respectively through " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunite and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section of direct current, line electrode applies negative dc high voltage electricity, the sub-lower limb of teflon insulation is avoided to be directly exposed in water vapour environment by the sub-water string of teflon insulation, effectively prevent line electrode and plate electrode conducting, by " electrostatic precipitation mechanism ", the particle of most of Large stone and water vapor particle are collected on moisture film electrode, deashing dedusting is carried out by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence district of pulse, line electrode applies positive pulse high-tension electricity, by the protection of the sub-water string of teflon insulation and teflon insulation, effectively prevent line electrode and plate electrode conducting, by the charged coalescence method of pulse, the diffusional charging of the charged and a large amount of cation of the diffusion mobility of a large amount of high-energy electron, realize varying in size " asymmetric heteropolarity is charged " of particles thing, under the effect of " coagulation is also machine-processed " and " steam coring condensation growth mechanism ", promote that the coalescence between particle is grown up form large-size particles thing, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section, line electrode applies negative dc high voltage electricity, plate electrode ground connection, by the protection of the sub-water string of teflon insulation and teflon insulation, effectively prevent line electrode and plate electrode conducting, by " electrostatic precipitation mechanism ", particle and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting is discharged by aerosol outlet, thus completes the subtractive process of aerosol particle thing.
Described outfield coalescence method is: just spray into airflow direction after saturated steam and chemical agglomeration agent enter nozzle respectively by steam and chemical agglomeration agent access pipeline, wherein steam is that the nuclei of condensation undergo phase transition condensation with fine particle, the particle diameter of particle and quality are increased, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport to collide, thus make fine particle Caragana seed pests; Under the interaction of surface tension, viscous force and air drag, be atomized into droplet after chemical agglomeration agent is ejected, impel aerosol particle thing Caragana seed pests by the physical action of theory of flocculation.
The charged coalescence method of described pulse is: line electrode produces streamer corona discharge after applying positive pulse high-tension electricity, corona zone can through positive and negative electrode, a large amount of high-octane electronics and negative ions is there is in streamer passage, the charge capacity of electronics is better than ion, the number of cation is more than anion, the diffusional charging of the charged and ion of the diffusion mobility of electronics is there is within the whole pulse period, make to vary in size particle diameter particle lotus on the electric charge of opposed polarity, electrically charged particle collides coalescence mutually by diffusion and coulomb interaction.
Described moisture film electrode ash removal method is: clean water source enters tank by moisture film electrode external water source access pipeline, the top of tank has overfall and water inlet can be avoided preferably to shove the formation of interference moisture film near wall place, when the water level in tank exceedes overfall height, current can overflow the gap entering baffle plate and plate electrode, under the effect of baffle plate, current are uniformly distributed formation water membrane from top to bottom on the surface of plate electrode, when aerosol particle thing and water vapor particle are trapped by plate electrode, under the effect of moisture film, mixed serum is directly entered ash bucket and is discharged by ash bucket serum outlet, thus dust stratification can not be formed on plate electrode surface, maintain the stable of electric field, avoid inverse corona and reentrainment of dust, improve the effect of gathering dust.
Compared with the existing technology, beneficial effect of the present invention is embodied in:
(1) the coupled structure form of two coalescence district of " coalescence-gather dust-coalescence-gather dust " and two dust collection section is adopted, by removing of aerosol particle thing, especially the subtractive process of fine particle carries out classification piecemeal, alleviate the operating pressure in single dedusting region, be conducive to the removal effect improving particle;
(2) " coalescence district, outfield " is arranged in device effect foremost, the Caragana seed pests of fine particle is facilitated on the one hand by " phase transformation condensation growth mechanism " and " Flocculating mechanism " and " steam coring condensation growth mechanism ", improve the removal effect in early stage of particle, effect is removed on the other hand by follow-up " dedusting-coalescence-dedusting " trizonal coalescence, farthest can remove the water vapor particle that " coalescence district, outfield " produces, avoid producing larger impact to flue gas subsequent treatment;
(3) " pulse charged coalescence district " is adopted to carry out follow-up charged coalescence effect to particle, the a large amount of high energy electron produced by corona discharge pulse on the one hand and the strengthening of a large amount of ion are varied in size the charged effect of particle of particle diameter, direct-current discharge improves electric-field intensity relatively on the other hand, also promotes the coalescence of electrically charged particle;
(4) adopt the sub-water string of teflon insulation to prevent the sub-lower limb of teflon insulation to be directly exposed in water vapour environment, effectively prevent line electrode and plate electrode conducting, thus guarantee to provide higher discharge voltage and electric-field intensity;
(5) adopt moisture film electrode ash removal method, be convenient to deashing, avoid forming dust stratification on plate electrode surface, maintain the stable of electric field, avoid inverse corona and reentrainment of dust, improve the effect of gathering dust;
(5) this many field coordination fine particle efficient removal device adopts classification piecemeal to remove, and particle accommodation is extensive, and fine particle removal efficiency is high, and the system stable operation time is longer.
Accompanying drawing explanation
Fig. 1 is the structural representation of many field coordination fine particle efficient removal device;
Fig. 2 is many field coordination fine particle efficient removal device moisture film electrode structure schematic diagram;
In figure, aerosol particle thing import 1, air distribution plate 2, coalescence district, outfield 3, the pre-dust collection section of direct current 4, pulse charged coalescence district 5, direct current dust collection section 6, aerosol outlet 7, nozzle 8, steam and chemical agglomeration agent access pipeline 9, teflon insulation 10, the sub-water string of teflon insulation 11, ash bucket serum outlet 12, negative dc high voltage electric wire 13, positive pulse high-tension bus-bar 14, line electrode 15, ash bucket 16, the external water source access of moisture film electrode pipeline 17, tank 18, baffle plate 19, plate electrode 20.
Detailed description of the invention
As Fig. 1, shown in 2, many field coordination fine particle efficient removal device comprises aerosol particle thing import 1, air distribution plate 2, coalescence district, outfield 3, the pre-dust collection section 4 of direct current, the charged coalescence district 5 of pulse, direct current dust collection section 6, aerosol outlet 7, nozzle 8, steam and chemical agglomeration agent access pipeline 9, teflon insulation 10, the sub-water string 11 of teflon insulation, ash bucket serum outlet 12, negative dc high voltage electric wire 13, positive pulse high-tension bus-bar 14, line electrode 15, ash bucket 16, moisture film electrode external water source access pipeline 17, tank 18, baffle plate 19, plate electrode 20, described aerosol particle thing import 1, air distribution plate 2, coalescence district, outfield 3, the pre-dust collection section of direct current 4, the charged coalescence district 5 of pulse, direct current dust collection section 6, aerosol outlet 7 are connected in turn, coalescence district, described outfield 3 comprises nozzle 8, steam and chemical agglomeration agent access pipeline 9, ash bucket serum outlet 12, ash bucket 16, described nozzle 8 adopts pressure rotating nozzle, be arranged in directly over runner middle and ash bucket, nozzle comprise nozzle outer rim tangent-type arrange import, liquid in rotation room, spray apertures, flow path direction is just carried out to aerosol in jet expansion direction, and nozzle 8 accesses pipeline 9 with the steam and chemical agglomeration agent that are fixed on top, coalescence district, outfield and is connected, the pre-dust collection section of described direct current 4 and direct current dust collection section 6 adopt identical line plank frame to arrange, wherein the pre-dust collection section 4 of direct current comprises teflon insulation 10, the sub-water string 11 of teflon insulation, ash bucket serum outlet 12, negative dc high voltage electric wire 13, line electrode 15, ash bucket 16, moisture film electrode external water source access pipeline 17, tank 18, baffle plate 19, plate electrode 20, top, direct current pre-dust collection section is provided with multiple teflon insulation 10, the sub-water string 11 of teflon insulation is provided with outside teflon insulation 10, teflon insulation is inserted with line electrode 15, line electrode 15 is connected with negative dc high voltage electric wire 13, both sides, top, direct current pre-dust collection section are provided with moisture film electrode external water source access pipeline 17, tank 18, baffle plate 19, direct current pre-dust collection section two madial wall is provided with plate electrode 20, plate electrode 20 ground connection, bottom, direct current pre-dust collection section is provided with ash bucket, hopper bottom is provided with ash bucket serum outlet 12, the charged coalescence district 5 of described pulse adopts line plank frame to arrange, comprise teflon insulation 10, the sub-water string 11 of teflon insulation, ash bucket serum outlet 12, positive pulse high-tension bus-bar 14, line electrode 15, ash bucket 16, moisture film electrode external water source access pipeline 17, tank 18, baffle plate 19, plate electrode 20, top, pulse charged coalescence district is provided with multiple teflon insulation 10, the sub-water string 11 of teflon insulation is provided with outside teflon insulation 10, teflon insulation is inserted with line electrode 15, line electrode 15 is connected with positive pulse high-tension bus-bar 14, both sides, top, pulse charged coalescence district are provided with moisture film electrode external water source access pipeline 17, tank 18, baffle plate 19, pulse charged coalescence district two madial wall is provided with plate electrode 20, bottom, pulse charged coalescence district is provided with ash bucket, hopper bottom is provided with ash bucket serum outlet 12.
Described line electrode 15 adopts stainless steel material, vertically be arranged side by side along runner center line, end flushes with ash bucket 16 top edge, described teflon insulation 10 lower limbs stretch in the sub-water string 11 of teflon insulation, and lower than the height of teflon insulation water string 11 lower limb.
Described plate electrode 20 adopts stainless steel material, is vertically arranged in runner both sides, forms moisture film electrode structure.As preferably, plate electrode 20 surface keeps smooth.
Many field coordination fine particle efficient removal method is: aerosol particle thing is evenly distributed and enters coalescence district, outfield 3 after aerosol particle thing import 1, air distribution plate 2, by outfield coalescence method under the effect of steam and chemical agglomeration agent, fine particle is respectively through " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunite and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section 4 of direct current, line electrode 15 applies negative dc high voltage electricity, teflon insulation 10 lower limbs are avoided to be directly exposed in water vapour environment by the sub-water string 11 of teflon insulation, effectively prevent line electrode 15 and plate electrode 20 conducting, by " electrostatic precipitation mechanism ", the particle of most of Large stone and water vapor particle are collected on moisture film electrode, deashing dedusting is carried out by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence district 5 of pulse, line electrode 15 applies positive pulse high-tension electricity, by the protection of the sub-water string 11 of teflon insulation and teflon insulation 10, effectively prevent line electrode 15 and plate electrode 20 conducting, by the charged coalescence method of pulse, the diffusional charging of the charged and a large amount of cation of the diffusion mobility of a large amount of high-energy electron, realize varying in size " asymmetric heteropolarity is charged " of particles thing, under the effect of " coagulation is also machine-processed " and " steam coring condensation growth mechanism ", promote that the coalescence between particle is grown up form large-size particles thing, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section 6, line electrode 15 applies negative dc high voltage electricity, plate electrode 20 ground connection, by the protection of the sub-water string 11 of teflon insulation and teflon insulation 10, effectively prevent line electrode 15 and plate electrode 20 conducting, by " electrostatic precipitation mechanism ", particle and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting is discharged by aerosol outlet 7, thus completes the subtractive process of aerosol particle thing.
Described outfield coalescence method is: just spray into airflow direction after saturated steam and chemical agglomeration agent enter nozzle 8 respectively by steam and chemical agglomeration agent access pipeline 9, wherein steam is that the nuclei of condensation undergo phase transition condensation with fine particle, the particle diameter of particle and quality are increased, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport to collide, thus make fine particle Caragana seed pests; Under the interaction of surface tension, viscous force and air drag, be atomized into droplet after chemical agglomeration agent is ejected, impel aerosol particle thing Caragana seed pests by the physical action of theory of flocculation.
The charged coalescence method of described pulse is: line electrode 15 produces streamer corona discharge after applying positive pulse high-tension electricity, corona zone can through positive and negative electrode, a large amount of high-octane electronics and negative ions is there is in streamer passage, the charge capacity of electronics is better than ion, the number of cation is more than anion, the diffusional charging of the charged and ion of the diffusion mobility of electronics is there is within the whole pulse period, make to vary in size particle diameter particle lotus on the electric charge of opposed polarity, electrically charged particle collides coalescence mutually by diffusion and coulomb interaction.
Described moisture film electrode ash removal method is: clean water source enters tank 18 by moisture film electrode external water source access pipeline 17, the top of tank 18 has overfall and water inlet can be avoided preferably to shove the formation of interference moisture film near wall place, when the water level in tank 18 exceedes overfall height, current can overflow the gap entering baffle plate 19 and plate electrode 20, under the effect of baffle plate 19, current are uniformly distributed formation water membrane from top to bottom on the surface of plate electrode 20, when aerosol particle thing and water vapor particle are trapped by plate electrode 20, under the effect of moisture film, mixed serum is directly entered ash bucket 16 and is discharged by ash bucket serum outlet 12, thus dust stratification can not be formed on plate electrode 20 surface, maintain the stable of electric field, avoid inverse corona and reentrainment of dust, improve the effect of gathering dust.

Claims (7)

1. the efficient removal of field coordination fine particle more than kind device, it is characterized in that comprising aerosol particle thing import (1), air distribution plate (2), coalescence district, outfield (3), the pre-dust collection section of direct current (4), the charged coalescence district (5) of pulse, direct current dust collection section (6), aerosol outlet (7), nozzle (8), steam and chemical agglomeration agent access pipeline (9), teflon insulation (10), the sub-water string of teflon insulation (11), ash bucket serum outlet (12), negative dc high voltage electric wire (13), positive pulse high-tension bus-bar (14), line electrode (15), ash bucket (16), external water source access pipeline (17) of moisture film electrode, tank (18), baffle plate (19), plate electrode (20), described aerosol particle thing import (1), air distribution plate (2), coalescence district, outfield (3), the pre-dust collection section of direct current (4), the charged coalescence district (5) of pulse, direct current dust collection section (6), aerosol outlet (7) are connected in turn, coalescence district, described outfield (3) comprises nozzle (8), steam and chemical agglomeration agent and accesses pipeline (9), ash bucket serum outlet (12), ash bucket (16), described nozzle (8) adopts pressure rotating nozzle, be arranged in directly over runner middle and ash bucket, flow path direction is just carried out to aerosol in jet expansion direction, and nozzle (8) accesses pipeline (9) with the steam and chemical agglomeration agent that are fixed on top, coalescence district, outfield and is connected, the pre-dust collection section of described direct current (4) and direct current dust collection section (6) adopt identical line plank frame to arrange, wherein the pre-dust collection section of direct current (4) comprise teflon insulation (10), the sub-water string of teflon insulation (11), ash bucket serum outlet (12), negative dc high voltage electric wire (13), line electrode (15), ash bucket (16), external water source access pipeline (17) of moisture film electrode, tank (18), baffle plate (19), plate electrode (20), top, direct current pre-dust collection section is provided with multiple teflon insulation (10), the sub-water string of teflon insulation (11) is provided with outside teflon insulation (10), teflon insulation is inserted with line electrode (15), line electrode (15) is connected with negative dc high voltage electric wire (13), and both sides, top, direct current pre-dust collection section are provided with external water source access pipeline (17) of moisture film electrode, tank (18), baffle plate (19), direct current pre-dust collection section two madial wall is provided with plate electrode (20), plate electrode (20) ground connection, and bottom, direct current pre-dust collection section is provided with ash bucket, and hopper bottom is provided with ash bucket serum outlet (12), the charged coalescence district (5) of described pulse adopts line plank frame to arrange, comprises teflon insulation (10), the sub-water string of teflon insulation (11), ash bucket serum outlet (12), positive pulse high-tension bus-bar (14), line electrode (15), ash bucket (16), external water source access pipeline (17) of moisture film electrode, tank (18), baffle plate (19), plate electrode (20), top, pulse charged coalescence district is provided with multiple teflon insulation (10), the sub-water string of teflon insulation (11) is provided with outside teflon insulation (10), teflon insulation is inserted with line electrode (15), line electrode (15) is connected with positive pulse high-tension bus-bar (14), and both sides, top, pulse charged coalescence district are provided with external water source access pipeline (17) of moisture film electrode, tank (18), baffle plate (19), pulse charged coalescence district two madial wall is provided with plate electrode (20), and bottom, pulse charged coalescence district is provided with ash bucket, and hopper bottom is provided with ash bucket serum outlet (12).
2. one many field coordination fine particle efficient removal device according to claim 1, it is characterized in that, described line electrode (15) adopts stainless steel material, vertically be arranged side by side along runner center line, end flushes with ash bucket (16) top edge, described teflon insulation (10) lower limb stretches in the sub-water string of teflon insulation (11), and lower than the height of the sub-water string of teflon insulation (11) lower limb.
3. one many field coordination fine particle efficient removal device according to claim 1, is characterized in that, described plate electrode (20) adopts stainless steel material, is vertically arranged in runner both sides, forms moisture film electrode structure.
4. one kind uses many field coordination fine particle efficient removal method of device as claimed in claim 1, it is characterized in that, aerosol particle thing is evenly distributed and enters coalescence district, outfield (3) after aerosol particle thing import (1), air distribution plate (2), by outfield coalescence method under the effect of steam and chemical agglomeration agent, fine particle is respectively through " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunite and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section of direct current (4), at line electrode (15) upper applying negative dc high voltage electricity, teflon insulation (10) lower limb is avoided to be directly exposed in water vapour environment by the sub-water string of teflon insulation (11), effectively prevent line electrode (15) and plate electrode (20) conducting, by " electrostatic precipitation mechanism ", the particle of most of Large stone and water vapor particle are collected on moisture film electrode, deashing dedusting is carried out by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence district (5) of pulse, at line electrode (15) upper applying positive pulse high-tension electricity, by the protection of the sub-water string of teflon insulation (11) and teflon insulation (10), effectively prevent line electrode (15) and plate electrode (20) conducting, by the charged coalescence method of pulse, the diffusional charging of the charged and a large amount of cation of the diffusion mobility of a large amount of high-energy electron, realize varying in size " asymmetric heteropolarity is charged " of particles thing, under the effect of " coagulation is also machine-processed " and " steam coring condensation growth mechanism ", promote that the coalescence between particle is grown up form large-size particles thing, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section (6), at line electrode (15) upper applying negative dc high voltage electricity, plate electrode (20) ground connection, by the protection of the sub-water string of teflon insulation (11) and teflon insulation (10), effectively prevent line electrode (15) and plate electrode (20) conducting, by " electrostatic precipitation mechanism ", particle and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting is discharged by aerosol outlet (7), thus completes the subtractive process of aerosol particle thing.
5. a kind of many field coordination fine particle efficient removal method as claimed in claim 4, it is characterized in that, described outfield coalescence method is: just spray into airflow direction after saturated steam and chemical agglomeration agent enter nozzle (8) respectively by steam and chemical agglomeration agent access pipeline (9), wherein steam is that the nuclei of condensation undergo phase transition condensation with fine particle, the particle diameter of particle and quality are increased, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport to collide, thus make fine particle Caragana seed pests; Under the interaction of surface tension, viscous force and air drag, be atomized into droplet after chemical agglomeration agent is ejected, impel aerosol particle thing Caragana seed pests by the physical action of theory of flocculation.
6. a kind of many field coordination fine particle efficient removal method as claimed in claim 4, it is characterized in that, the charged coalescence method of described pulse is: line electrode (15) produces streamer corona discharge after applying positive pulse high-tension electricity, the through positive and negative electrode in corona zone, a large amount of high-octane electronics and negative ions is there is in streamer passage, the charge capacity of electronics is better than ion, the number of cation is more than anion, the diffusional charging of the charged and ion of the diffusion mobility of electronics is there is within the whole pulse period, make to vary in size particle diameter particle lotus on the electric charge of opposed polarity, electrically charged particle collides coalescence mutually by diffusion and coulomb interaction.
7. a kind of many field coordination fine particle efficient removal method as claimed in claim 4, it is characterized in that, described moisture film electrode ash removal method is: clean water source enters tank (18) by external water source access pipeline (17) of moisture film electrode, the top of tank (18) has overfall and water inlet can be avoided preferably to shove the formation of interference moisture film near wall place, when the water level in tank (18) exceedes overfall height, current can overflow the gap entering baffle plate (19) and plate electrode (20), under the effect of baffle plate (19), current are uniformly distributed formation water membrane from top to bottom on the surface of plate electrode (20), when aerosol particle thing and water vapor particle are trapped by plate electrode (20), under the effect of moisture film, mixed serum is directly entered ash bucket (16) and is discharged by ash bucket serum outlet (12), thus dust stratification can not be formed on plate electrode (20) surface, maintain the stable of electric field, avoid inverse corona and reentrainment of dust, improve the effect of gathering dust.
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