CN103768886A - 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 PDFInfo
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- CN103768886A CN103768886A CN201410032778.0A CN201410032778A CN103768886A CN 103768886 A CN103768886 A CN 103768886A CN 201410032778 A CN201410032778 A CN 201410032778A CN 103768886 A CN103768886 A CN 103768886A
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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
Technical field
The present invention relates to particle dust arrester, relate in particular to a kind of many collaborative fine particles and efficiently remove devices and methods therefor.
Background technology
China is a country take fire coal as main energy sources, coal burning is in providing thermal source and power for us, also brought serious Particulate Pollution, 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, be discharged in air and can have a strong impact on daily life and work afterwards, even threaten people's life security.Because the volume of fine particle is little, lightweight, therefore atmospheric residence time is long, floating distance, and coverage is wide.And due to the photoextinction of its uniqueness, can the serious visibility that reduces 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 metals can be enriched in its surface, and human body can enter human respiratory tract, be deposited in alveolar the limited fine particle that causes of the blocking capability of fine particle, heavy metal wherein can enter blood of human body, the disease that causes asthma, bronchus and the aspect such as cardiovascular, is detrimental to health.
The most of coal-fired power station boilers of China adopt electrostatic precipitator (ESP) to remove the particle in tail flue gas at present.Efficiently electrostatic precipitator efficiency of dust collection can be up to 99.7%, but for fine particle, and especially particle diameter is at the particle of 0.1 micron to 1.0 microns, and the ratio that still has 15% left and right escapes into atmosphere.Therefore consider to add the pre-agglomeration device of fine particle before electrostatic precipitator, allow fine particle first reunite and to grow up into the particle of greater particle size under the effect of physics or chemistry, then collect by electrostatic precipitator.The method of agglomeration of studying at present comprises: electric reunion, acoustic agglomeration, phase transformation condensation growth and chemical agglomeration etc., but when these method of agglomeration independent roles, there is certain drawback, not clearly to the reunion effect of fine particle, so final fine particle removal efficiency can not effectively improve.
Therefore, developing a kind of novel fine particle based on many Synergistic methods, efficiently to remove device very necessary, by outfield coalescence and the effective combination of the charged coalescence of pulse, make fine particle reunite and grow up into the particle of greater particle size under the effect of the multi-acting forces such as electric field force, thermophoretic forces, liquid bridge power and solid bridge power, finally realize efficiently and removing by electrostatic precipitator technology.
Summary of the invention
The object of the invention is to overcome the deficiency of the existing dust arrester of coal fired power plant to fine particle removal effect, provide a kind of many collaborative fine particles efficiently to remove devices and methods therefor.This fine particle removing device can be 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 coagulation the technology in chemical agglomeration Flocculating mechanism and the charged coalescence of pulse district, promote the efficient reunion of fine particle to grow up, finally by two direct currents gather dust region realize efficiently remove, especially the efficient coalescence of fine particle removes, and effectively avoids the anti-corona of plate electrode, reentrainment of dust, dust stratification and corrosion.
Many collaborative fine particles efficiently remove device and comprise the import of aerosol particle thing, air distribution plate, coalescence district, outfield, the pre-dust collection section of direct current, the charged coalescence of pulse district, direct current dust collection section, aerosol outlet, nozzle, steam and chemical agglomeration agent access pipeline, teflon insulation, the sub-water string of teflon insulation, the outlet of ash bucket slurries, negative dc high voltage electric wire, positive pulse high-tension bus-bar, line electrode, ash bucket, the external water source access of moisture film electrode 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 of pulse district, direct current dust collection section, aerosol outlet are connected in turn, coalescence district, described outfield comprises nozzle, steam and chemical agglomeration agent access pipeline, the outlet of ash bucket slurries, ash bucket, described nozzle adopts pressure rotating nozzle, is arranged in directly over runner middle and ash bucket, and jet expansion direction is just carried out flow path direction to aerosol, and nozzle is connected with the steam and the chemical agglomeration agent access pipeline that are fixed on top, coalescence district, outfield, 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, the outlet of ash bucket slurries, negative dc high voltage electric wire, line electrode, ash bucket, the external water source access of moisture film electrode pipeline, tank, baffle plate, plate electrode, top, the pre-dust collection section of direct current is provided with multiple teflon insulation, teflon insulation is provided with the sub-water string of teflon insulation outward, teflon insulation is inserted with line electrode, line electrode is connected with negative dc high voltage electric wire, both sides, top, the pre-dust collection section of direct current are provided with the external water source access of moisture film electrode pipeline, tank, baffle plate, the pre-dust collection section of direct current two madial walls are provided with plate electrode, plate electrode ground connection, bottom, the pre-dust collection section of direct current is provided with ash bucket, ash bucket bottom is provided with the outlet of ash bucket slurries, the charged coalescence of described pulse district adopts line plank frame to arrange, comprise teflon insulation, the sub-water string of teflon insulation, the outlet of ash bucket slurries, positive pulse high-tension bus-bar, line electrode, ash bucket, the external water source access of moisture film electrode pipeline, tank, baffle plate, plate electrode, top, pulse charged coalescence district is provided with multiple teflon insulation, teflon insulation is provided with the sub-water string of teflon insulation outward, 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 the external water source access of moisture film electrode pipeline, tank, baffle plate, the charged coalescence of pulse district two madial walls are provided with plate electrode, bottom, pulse charged coalescence district is provided with ash bucket, ash bucket bottom is provided with the outlet of ash bucket slurries.
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 the efficient removal methods of collaborative fine particle are: aerosol particle thing is through being evenly distributed and entering 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 passes through respectively " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunites and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section of direct current, on line electrode, apply negative dc high voltage electricity, avoid the sub-lower limb of teflon insulation 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 the large particle diameter of major part and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence of pulse district, on line electrode, apply 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 cations of the diffusion mobility of a large amount of high-energy electrons, the realization particles thing " asymmetric heteropolarity is charged " that varies in size, under the effect of " coagulation mechanism " and " steam coring condensation growth mechanism ", promote coalescence between the particle formation large-size particles thing of growing up, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section, on line electrode, apply 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, carried out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting exports discharge by aerosol, thereby completes the subtractive process of aerosol particle thing.
Described outfield coalescence method is: saturated steam and chemical agglomeration agent just spray into airflow direction after entering nozzle by steam and chemical agglomeration agent access pipeline respectively, wherein steam condenses as the nuclei of condensation undergo phase transition take fine particle, make particle diameter and the mass penalty of particle, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport collision, thereby fine particle coalescence is grown up; After chemical agglomeration agent is ejected, under the interaction of surface tension, viscous force and air drag, be atomized into droplet, impel aerosol particle thing coalescence to grow up by the theoretical physical action that flocculates.
The charged coalescence method of described pulse is: line electrode produces streamer corona discharge after applying positive pulse high-tension electricity, corona zone can connect positive and negative electrode, in streamer passage, there is a large amount of high-octane electronics and negative ions, the charged ability of electronics is better than ion, the number of cation is more than anion, within the whole pulse period, exist the diffusional charging of the charged and ion of the diffusion mobility of electronics, make the to vary in size electric charge of opposed polarity on the particle lotus of particle diameter, 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 the external water source access of moisture film electrode pipeline, the top of tank has overfall near wall place and can avoid preferably water inlet to shove disturbing the formation of moisture film, in the time that the water level in tank exceedes overfall height, current can overflow the gap that enters 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, in the time that aerosol particle thing and water vapor particle are trapped by plate electrode, under the effect of moisture film, mixed serum directly enters ash bucket and discharges by the outlet of ash bucket slurries, thereby can not form dust stratification on plate electrode surface, maintain the stable of electric field, avoid anti-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 the He Shuan dust collection section, two coalescences district of employing " coalescence-gathering dust-coalescence-gathering dust ", 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 improve the removal effect of particle;
(2) " coalescence district, outfield " is arranged in to device effect foremost, promote the coalescence of fine particle to grow up by " phase transformation condensation growth mechanism " and " Flocculating mechanism " and " steam coring condensation growth mechanism " on the one hand, improve the removal effect in early stage of particle, remove effect by follow-up " dedusting-coalescence-dedusting " trizonal coalescence on the other hand, can farthest remove the water vapor particle that " coalescence district, outfield " produces, avoid flue gas subsequent treatment to produce larger impact;
(3) adopt " the charged coalescence of pulse district " to carry out follow-up charged coalescence effect to particle, the a large amount of high energy electrons that produce by corona discharge pulse on the one hand and a large amount of ion are strengthened the charged effect of the particle of the particle diameter that varies in size, direct-current discharge has improved electric-field intensity relatively on the other hand, has also promoted the coalescence of electrically charged particle;
(4) adopt the sub-water string of teflon insulation to prevent that the sub-lower limb of teflon insulation is directly exposed in water vapour environment, effectively prevent line electrode and plate electrode conducting, thereby guarantee the discharge voltage and the electric-field intensity that provide higher;
(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 anti-corona and reentrainment of dust, improved the effect of gathering dust;
(5) these many collaborative fine particles efficiently remove device and adopt 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 that many collaborative fine particles efficiently remove device;
Fig. 2 is that many collaborative fine particles efficiently remove 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 4 of direct current, the charged coalescence of pulse 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 11 of teflon insulation, ash bucket slurries 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.
The specific embodiment
As Fig. 1, shown in 2, many collaborative fine particles efficiently remove device and comprise 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 of pulse 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 11 of teflon insulation, ash bucket slurries 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, described 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 of pulse district 5, 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 slurries outlet 12, ash bucket 16, described nozzle 8 adopts pressure rotating nozzle, be arranged in directly over runner middle and ash bucket, nozzle comprises import, liquid in rotation chamber, the spray apertures that nozzle outer rim tangent-type is arranged, jet expansion direction is just carried out flow path direction to aerosol, and nozzle 8 is connected with the steam and the chemical agglomeration agent access pipeline 9 that are fixed on top, coalescence district, outfield, the pre-dust collection section 4 of described direct current 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 slurries outlet 12, negative dc high voltage electric wire 13, 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, top, the pre-dust collection section of direct current is provided with multiple teflon insulation 10, the outer sub-water string 11 of teflon insulation that is provided with of 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, the pre-dust collection section of direct current are provided with the external water source access of moisture film electrode pipeline 17, tank 18, baffle plate 19, the pre-dust collection section of direct current two madial walls are provided with plate electrode 20, plate electrode 20 ground connection, bottom, the pre-dust collection section of direct current is provided with ash bucket, ash bucket bottom is provided with ash bucket slurries outlet 12, the charged coalescence of described pulse district 5 adopts line plank frame to arrange, comprise teflon insulation 10, the sub-water string 11 of teflon insulation, ash bucket slurries outlet 12, 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, top, pulse charged coalescence district is provided with multiple teflon insulation 10, the outer sub-water string 11 of teflon insulation that is provided with of 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 the external water source access of moisture film electrode pipeline 17, tank 18, baffle plate 19, the charged coalescence of pulse district two madial walls are provided with plate electrode 20, bottom, pulse charged coalescence district is provided with ash bucket, ash bucket bottom is provided with ash bucket slurries 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 edges, described teflon insulation 10 lower limbs stretch in the sub-water string 11 of teflon insulation, and lower than the height of sub-water string 11 lower limbs of teflon insulation.
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 surfaces keep smooth.
Many the efficient removal methods of collaborative fine particle are: aerosol particle thing is through being evenly distributed and entering 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 passes through respectively " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunites and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section 4 of direct current, on line electrode 15, apply negative dc high voltage electricity, avoid teflon insulation 10 lower limbs 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 conductings, by " electrostatic precipitation mechanism ", the particle of the large particle diameter of major part and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence of pulse district 5, on line electrode 15, apply 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 conductings, by the charged coalescence method of pulse, the diffusional charging of the charged and a large amount of cations of the diffusion mobility of a large amount of high-energy electrons, the realization particles thing " asymmetric heteropolarity is charged " that varies in size, under the effect of " coagulation mechanism " and " steam coring condensation growth mechanism ", promote coalescence between the particle formation large-size particles thing of growing up, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section 6, on line electrode 15, apply 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 conductings, by " electrostatic precipitation mechanism ", particle and water vapor particle are collected on moisture film electrode, carried out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting exports 7 by aerosol and discharges, thereby completes the subtractive process of aerosol particle thing.
Described outfield coalescence method is: saturated steam and chemical agglomeration agent enter by steam and chemical agglomeration agent access pipeline 9 respectively that nozzle 8 is rear just to be sprayed into airflow direction, wherein steam condenses as the nuclei of condensation undergo phase transition take fine particle, make particle diameter and the mass penalty of particle, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport collision, thereby fine particle coalescence is grown up; After chemical agglomeration agent is ejected, under the interaction of surface tension, viscous force and air drag, be atomized into droplet, impel aerosol particle thing coalescence to grow up by the theoretical physical action that flocculates.
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 connect positive and negative electrode, in streamer passage, there is a large amount of high-octane electronics and negative ions, the charged ability of electronics is better than ion, the number of cation is more than anion, within the whole pulse period, exist the diffusional charging of the charged and ion of the diffusion mobility of electronics, make the to vary in size electric charge of opposed polarity on the particle lotus of particle diameter, 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 the external water source access of moisture film electrode pipeline 17, the top of tank 18 has overfall near wall place and can avoid preferably water inlet to shove disturbing the formation of moisture film, in the time that the water level in tank 18 exceedes overfall height, current can overflow the gap that enters 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, in the time that aerosol particle thing and water vapor particle are trapped by plate electrode 20, under the effect of moisture film, mixed serum directly enters ash bucket 16 and discharges by ash bucket slurries outlet 12, thereby can not form dust stratification on plate electrode 20 surfaces, maintain the stable of electric field, avoid anti-corona and reentrainment of dust, improve the effect of gathering dust.
Claims (7)
1. more than one kind collaborative fine particle efficiently removes 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 of pulse 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 slurries outlets (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 pipeline of moisture film electrode (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 of pulse district (5), 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), the outlet of ash bucket slurries (12), ash bucket (16), described nozzle (8) adopts pressure rotating nozzle, be arranged in directly over runner middle and ash bucket, jet expansion direction is just carried out flow path direction to aerosol, and nozzle (8) is connected with the steam and the chemical agglomeration agent access pipeline (9) that are fixed on top, coalescence district, outfield, 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 slurries outlets (12), negative dc high voltage electric wire (13), line electrode (15), ash bucket (16), the external water source access pipeline of moisture film electrode (17), tank (18), baffle plate (19), plate electrode (20), top, the pre-dust collection section of direct current is provided with multiple teflon insulation (10), the outer sub-water string of teflon insulation (11) that is provided with of 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, the pre-dust collection section of direct current are provided with the external water source access pipeline of moisture film electrode (17), tank (18), baffle plate (19), the pre-dust collection section of direct current two madial walls are provided with plate electrode (20), plate electrode (20) ground connection, bottom, the pre-dust collection section of direct current is provided with ash bucket, and ash bucket bottom is provided with ash bucket slurries outlets (12), the charged coalescence of described pulse district (5) adopts line plank frame to arrange, comprises teflon insulation (10), the sub-water string of teflon insulation (11), ash bucket slurries outlets (12), positive pulse high-tension bus-bar (14), line electrode (15), ash bucket (16), the external water source access pipeline of moisture film electrode (17), tank (18), baffle plate (19), plate electrode (20), top, pulse charged coalescence district is provided with multiple teflon insulation (10), the outer sub-water string of teflon insulation (11) that is provided with of 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 the external water source access pipeline of moisture film electrode (17), tank (18), baffle plate (19), the charged coalescence of pulse district two madial walls are provided with plate electrode (20), and bottom, pulse charged coalescence district is provided with ash bucket, and ash bucket bottom is provided with ash bucket slurries outlets (12).
2. many collaborative fine particles of one according to claim 1 efficiently remove device, 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. many collaborative fine particles of one according to claim 1 efficiently remove device, it is characterized in that, described plate electrode (20) adopts stainless steel material, is vertically arranged in runner both sides, form moisture film electrode structure.
4. many efficient removal methods of collaborative fine particle that use is installed as claimed in claim 1, it is characterized in that, aerosol particle thing is evenly distributed afterwards and enters coalescence district, outfield (3) through aerosol particle thing import (1), air distribution plate (2), by outfield coalescence method, under the effect of steam and chemical agglomeration agent, fine particle passes through respectively " phase transformation condensation growth mechanism ", " Flocculating mechanism " and " steam coring condensation growth mechanism " and reunites and form large-size particles thing, aerosol particle thing after the coalescence of outfield enters the pre-dust collection section of direct current (4), on line electrode (15), apply negative dc high voltage electricity, avoid teflon insulation (10) lower limb 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 the large particle diameter of major part and water vapor particle are collected on moisture film electrode, carry out deashing dedusting by moisture film electrode ash removal method, the large-size particles thing of residue small size particle and small part enters the charged coalescence of pulse district (5), on line electrode (15), apply 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 cations of the diffusion mobility of a large amount of high-energy electrons, the realization particles thing " asymmetric heteropolarity is charged " that varies in size, under the effect of " coagulation mechanism " and " steam coring condensation growth mechanism ", promote coalescence between the particle formation large-size particles thing of growing up, aerosol particle thing after the charged coalescence of pulse enters direct current dust collection section (6), on line electrode (15), apply 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, carried out deashing dedusting by moisture film electrode ash removal method, aerosol after dedusting exports (7) by aerosol and discharges, thereby completes the subtractive process of aerosol particle thing.
5. many efficient removal methods of collaborative fine particle of one as claimed in claim 4, it is characterized in that, described outfield coalescence method is: saturated steam and chemical agglomeration agent just spray into airflow direction after entering nozzle (8) by steam and chemical agglomeration agent access pipeline (9) respectively, wherein steam condenses as the nuclei of condensation undergo phase transition take fine particle, make particle diameter and the mass penalty of particle, and produce the effect of diffusiophoresis and thermophoresis, impel Particles transport collision, thereby fine particle coalescence is grown up; After chemical agglomeration agent is ejected, under the interaction of surface tension, viscous force and air drag, be atomized into droplet, impel aerosol particle thing coalescence to grow up by the theoretical physical action that flocculates.
6. many efficient removal methods of collaborative fine particle of one 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, corona zone can connect positive and negative electrode, in streamer passage, there is a large amount of high-octane electronics and negative ions, the charged ability of electronics is better than ion, the number of cation is more than anion, within the whole pulse period, exist the diffusional charging of the charged and ion of the diffusion mobility of electronics, the electric charge of opposed polarity on the particle lotus of particle diameter makes to vary in size, electrically charged particle collides coalescence mutually by diffusion and coulomb interaction.
7. many efficient removal methods of collaborative fine particle of one 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 the external water source access pipeline of moisture film electrode (17), the top of tank (18) has overfall near wall place and can avoid preferably water inlet to shove disturbing the formation of moisture film, in the time that the water level in tank (18) exceedes overfall height, current can overflow the gap that enters 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), in the time that aerosol particle thing and water vapor particle are trapped by plate electrode (20), under the effect of moisture film, mixed serum directly enters ash bucket (16) and discharges by ash bucket slurries outlets (12), thereby can not form dust stratification on plate electrode (20) surface, maintain the stable of electric field, avoid anti-corona and reentrainment of dust, improve the effect of gathering dust.
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| CN201410032778.0A CN103768886B (en) | 2014-01-24 | 2014-01-24 | Efficient multi-field-coordination fine particulate matter removal device and method |
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| CN105032611A (en) * | 2015-06-12 | 2015-11-11 | 浙江大学 | Deep control system for multiple pollutants through wet static electricity and reinforced by pre-charging |
| CN105536401A (en) * | 2015-12-19 | 2016-05-04 | 常州大学 | Integrated fine pollution particulate matter efficient removal system |
| CN105817112A (en) * | 2016-04-20 | 2016-08-03 | 东南大学 | Dedusting pretreatment device and method based on vapor phase change coupled electric coalescence |
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