CN212594797U - Device of high-efficient desorption of many field subregion fine particles thing - Google Patents
Device of high-efficient desorption of many field subregion fine particles thing Download PDFInfo
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- CN212594797U CN212594797U CN201922238919.5U CN201922238919U CN212594797U CN 212594797 U CN212594797 U CN 212594797U CN 201922238919 U CN201922238919 U CN 201922238919U CN 212594797 U CN212594797 U CN 212594797U
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Abstract
The utility model discloses a device of high-efficient desorption of many field subregion fine particles, adopt the box structure that cross section structure size is the same, and the main part passageway adopts the series arrangement mode of runner central line coincidence, through the first negative direct current dust removal in advance, the strengthening of once sound wave reunion, the form of pulse electric charge coagulation and direct current bipolar coagulation, the strengthening of secondary sound wave reunion, back negative direct current dust removal, combine gravity to subside, inertial separation and "virtual impinger effect", strengthen the collision coagulation effect of fine particles through multiple electric coagulation mode and sound electricity synergism, divide the regional high-efficient desorption that gradually realizes big or small particle diameter particulate matter; through the parallel connection mode of pulse charge coagulation and direct current bipolar coagulation, the partition electric coagulation of particles with different particle sizes is realized by utilizing the inertia effect and the virtual impactor effect, and meanwhile, the trapping and removing effects of fine particles are enhanced through the dust removing and collecting effect of the movable electrode plate. The utility model discloses the fine particles desorption is efficient.
Description
Technical Field
The utility model relates to a flue gas dust removal technical field, specifically say, relate to a device of high-efficient desorption of many field subregion fine particles thing.
Background
China is a country using coal as a main energy source, coal combustion provides heat source and power for people and brings serious particulate pollution, coal-fired boiler emission occupies a large part of the sources of fine particulate matters, and particularly, small and medium-sized industrial boilers and industrial kilns widely used in various industries have serious pollution due to lack of corresponding environment-friendly control equipment. Aerosol particulate matter, in particular fine particulate matter PM2.5After being discharged into the air, the air can seriously affect the daily life and work of people and even threaten the life safety of people. Because the fine particles have small volume and light weight, the fine particles have long retention time in the atmosphere, long floating distance and wide influence range. And due to the unique extinction effect, the visibility of the environment can be seriously reduced, large-area dust-haze weather is caused, and the normal travel of people is influenced. In addition, the specific surface area of the fine particles is large, a large amount of toxic and harmful heavy metals can be enriched on the surface of the fine particles, and the human body has the problem that the human body has large specific surface areaThe limited blocking capacity to fine particles can cause the fine particles to enter human respiratory tracts and deposit in alveoli, and heavy metals in the fine particles can enter human blood to cause diseases in aspects of asthma, bronchus, cardiovascular diseases and the like and harm human health.
At present, most coal-fired power plant boilers in China mainly adopt an electrostatic precipitator (ESP) to remove particulate matters in tail flue gas. The dust removal efficiency of the high-efficiency electrostatic dust collector can reach 99.9%, but for fine particles, especially particles with the particle size of 0.1 micron to 1.0 micron, about 15% of the fine particles still escape to the atmosphere. Therefore, the aggregation of various particles is considered to be superimposed on the electrostatic dust collection mechanism, so that fine particles are firstly aggregated and grown into particles with larger particle size, and then the particles are collected through the electrostatic dust collection function. Agglomeration methods currently under investigation include: the method comprises the following steps of electric agglomeration, acoustic agglomeration, phase change agglomeration growth, chemical agglomeration and the like, wherein the action capacity of the electric agglomeration is strongest, but the traditional direct current corona electric agglomeration action or the agglomeration effect in a single electric agglomeration form is not obvious, and the removal effect of fine particles needs to be further improved.
Therefore, it is necessary to develop a novel efficient fine particle removal device based on the synergy of multi-channel multi-discharge-form acoustic-electric agglomeration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a device of the high-efficient desorption of many field partitions fine particles that structural design is reasonable, desorption efficiency is high.
The utility model provides a technical scheme that above-mentioned problem adopted is: a device for efficiently removing fine particles in multiple field partitions is characterized by comprising an aerosol inlet, an air distribution plate, a pre-dust collection area, a sound wave transition settling area, an electric field charge coagulation area, a sound wave mixed coagulation area, a direct current dust collection area and an aerosol outlet, wherein the aerosol inlet, the air distribution plate, the pre-dust collection area, the sound wave transition settling area, the electric field charge coagulation area, the sound wave mixed coagulation area, the direct current dust collection area and the aerosol outlet are sequentially arranged from left to right, and the aerosol inlet, the air distribution plate, the pre-dust collection area, the sound wave transition settling area, the electric field charge coagulation area, the sound wave mixed coagulation area, the direct current dust collection area and the aerosol outlet are sequentially communicated; a negative direct-current high-voltage wire and a direct-current dust collecting plate are arranged in the pre-dust collecting area, and a pre-dust collecting area dust hopper is arranged at the bottom of the pre-dust collecting area; the top of the sound wave transition settling zone is provided with a sound wave generator, and the bottom of the sound wave transition settling zone is provided with a sound wave transition settling zone ash bucket; the electric field charge coagulation area comprises a pulse charge coagulation area and a direct-current bipolar coagulation dust collection area, and the bottom of the electric field charge coagulation area is provided with an electric field charge coagulation area ash bucket; a positive pulse high-voltage wire and a planar electrode plate are arranged in the pulse charge coagulation area, and a positive direct current high-voltage wire, an electric insulation plate and a movable grid plate are arranged in the direct current bipolar coagulation dust collection area; the top of the sound wave mixing and merging area is provided with a sound wave generator, and the bottom of the sound wave mixing and merging area is provided with a sound wave mixing and merging area ash bucket; the direct current dust collection area is internally provided with a negative direct current high-voltage wire and a movable electrode plate, and the bottom of the direct current dust collection area is provided with a direct current dust collection area dust hopper.
Preferably, the pre-dust-collecting area, the pulse charge coagulation area, the direct-current bipolar coagulation dust-collecting area and the direct-current dust-collecting area are of box body structures with the same cross section structure and size, and the pre-dust-collecting area, the direct-current bipolar coagulation dust-collecting area and the direct-current dust-collecting area are arranged in series with the center lines of the flow channels overlapped.
Preferably, the pulse charge coagulation area, the direct-current bipolar coagulation dust collection area and the direct-current dust collection area are of equal-length box structures, and the number of electric fields is preferably greater than that of electric fields in the pre-dust collection area. In order to enhance the dust removing effect, the size of the direct current dust collecting area can be properly prolonged, and the number of electric fields is increased.
Preferably, the electric field charge condensation area comprises two identical pulse charge condensation areas and a direct-current bipolar condensation dust collection area, the direct-current bipolar condensation dust collection area is located between the two identical pulse charge condensation areas, the pulse charge condensation areas and the direct-current bipolar condensation dust collection area are arranged in parallel, and the flow channel center lines of the pulse charge condensation areas and the direct-current bipolar condensation dust collection areas are located on the same horizontal layer.
Preferably, the sound wave transition settling zone and the sound wave mixing and merging zone are symmetrically arranged on two sides of the electric field charge condensing zone, the sound generating devices of the sound wave generators are respectively over against the dust hopper of the sound wave transition settling zone and the dust hopper of the sound wave mixing and merging zone, and the central lines of the two sound wave generators coincide with the central lines of the flow channels of the pre-dust-collecting zone, the direct-current bipolar condensing and dust-collecting zone and the direct-current dust-collecting zone.
Preferably, the negative direct current high-voltage wire, the positive direct current high-voltage wire and the positive pulse high-voltage wire are all made of stainless steel materials, and the negative direct current high-voltage wire, the positive direct current high-voltage wire and the positive pulse high-voltage wire are arranged in parallel along the flow channel direction; the negative direct-current high-voltage wire and the positive direct-current high-voltage wire both adopt barbed wire electrodes, and barbs are radially distributed on the electrodes at equal intervals; the negative direct-current high-voltage wire is connected with an external negative direct-current high-voltage power supply, and the positive direct-current high-voltage wire is connected with an external positive direct-current high-voltage power supply; the positive pulse high-voltage wire adopts a smooth vertical wire electrode and is connected with an external high-voltage positive pulse power supply.
Preferably, the direct current dust collecting plate, the movable electrode plate, the planar electrode plate and the electric insulating plate are arranged in parallel along the flow channel direction, and the movable grid plate is arranged perpendicular to the flow channel direction; the direct current dust collection plate, the movable electrode plate, the planar electrode plate and the movable grid plate are all made of stainless steel materials, and the electric insulation plate is made of electric insulation materials; the direct current dust collecting plate and the movable electrode plate are preferably C-shaped dust collecting electrode plates, and the planar electrode plate and the electric insulating plate are smooth planar electrode plates; the movable grid plate adopts a multi-layer grid staggered arrangement mode.
Compared with the prior art, the utility model, have following advantage and effect:
1. the dust removal adopts a box body structure with the same cross section structure and size, and the main body channel adopts a series arrangement mode of overlapping the center lines of the flow channels, so that the smoothness of the flow field of the aerosol particle channel is kept, and dust deposition and scaling in a local area are avoided;
2. the method adopts an arrangement mode of pre-dedusting, primary sound wave agglomeration, secondary sound wave agglomeration and post-dedusting, combines gravity settling, inertial separation and a virtual impactor effect, strengthens the collision and agglomeration action of fine particles through various electrocoagulation modes and sound-electricity synergistic action, and gradually realizes the efficient removal of the particles with large and small particle sizes in different areas;
3. pre-dedusting and acoustic wave transitional settlement are arranged before charge coagulation, so that pre-removal of large-particle-size particles is realized to the maximum extent, and the load of subsequent coagulation and dust collection is reduced;
4. the arrangement of the sound wave transition settling zone, the electric field charge coagulation zone and the movable grid plate generates the action effect of a virtual impactor, and promotes the efficient separation and removal of particles with different particle sizes;
5. through the inertia separation, the virtual impactor effect and the pulse corona discharge effect, the heteropolarity charge effect of the particles with different sizes is enhanced by a large number of high-energy electrons and a large number of ions generated by the pulse corona discharge, the electrocoagulation of the particles with smaller sizes is greatly promoted, meanwhile, the electric field intensity is improved relative to the direct current discharge, and the coagulation of the charged particles is also promoted;
6. the negative direct current pre-collection dust and the positive direct current corona are arranged in series, so that the collision and coagulation effect of particles in an electric field area is enhanced through the change of the action direction of an electric field force, and the direct current bipolar charge coagulation effect is realized;
7. the pulse corona discharge area and the positive direct current corona discharge area are arranged in parallel, particles with different charge polarities are converged, the heteropolar coagulation effect of the particles is achieved, the collision coagulation of the particles is further promoted by the aid of sound field effect, and the coagulated particles are removed by the aid of gravity settling.
8. The movable grid plate and the movable electrode plate prevent dust from being deposited on the surface of the dust collecting plate, so that the electric field is stable, back corona and secondary dust raising are avoided, and the dust collecting efficiency is improved.
9. The device for efficiently removing the fine particles in the multi-field subareas effectively combines electrostatic dust collection, pulse electric coagulation, direct-current bipolar coagulation, sound wave agglomeration and virtual impactor effect, adopts the step-by-step fractional coagulation and removal of the particles with different particle sizes, and enables the fine particles to agglomerate and grow into particles with larger particle sizes under the action of various actions such as electric field force, coulomb force, sound field force, thermophoresis force, solid bridge force and the like, and finally realizes efficient removal through an electrostatic dust removal technology.
Drawings
Fig. 1 is a schematic front view of the embodiment of the present invention.
Fig. 2 is a schematic top view of an embodiment of the present invention.
In the figure: the device comprises an aerosol inlet 1, an air distribution plate 2, a pre-dust collection area 3, a pre-dust collection area ash bucket 4, a sound wave transition settling area 5, a sound wave transition settling area ash bucket 6, an electric field charge coagulation area 7, an electric field charge coagulation area ash bucket 8, a sound wave mixed coagulation area 9, a sound wave mixed coagulation area ash bucket 10, a direct current dust collection area 11, a direct current dust collection area ash bucket 12, an aerosol outlet 13, a negative direct current high-voltage wire 14, a direct current dust collection plate 15, a sound wave generator 16, a positive direct current high-voltage wire 17, a positive pulse high-voltage wire 18, a movable electrode plate 19, a planar electrode plate 20, an electric insulation plate 21, a movable bipolar grid plate 22, a pulse charge coagulation area 23 and a direct current coagulation dust collection area 24.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1 and fig. 2, the embodiment provides a device for efficiently removing fine particulate matters in multiple field partitions, which includes an aerosol inlet 1, an air distribution plate 2, a pre-dust collection area 3, an acoustic wave transition settling area 5, an electric field charge coagulation area 7, an acoustic wave mixed coagulation area 9, a direct current dust collection area 11 and an aerosol outlet 13, wherein the aerosol inlet 1, the air distribution plate 2, the pre-dust collection area 3, the acoustic wave transition settling area 5, the electric field charge coagulation area 7, the acoustic wave mixed coagulation area 9, the direct current dust collection area 11 and the aerosol outlet 13 are sequentially arranged from left to right, and the aerosol inlet 1, the air distribution plate 2, the pre-dust collection area 3, the acoustic wave transition settling area 5, the electric field charge coagulation area 7, the acoustic wave mixed coagulation area 9, the direct current dust collection area 11 and the aerosol outlet 13 are sequentially communicated with each other.
In the embodiment, a negative direct current high-voltage wire 14 and a direct current dust collecting plate 15 are arranged in the pre-dust collecting area 3, and a dust hopper 4 of the pre-dust collecting area is arranged at the bottom of the pre-dust collecting area 3; the top of the sound wave transition settling zone 5 is provided with a sound wave generator 16, and the bottom of the sound wave transition settling zone 5 is provided with a sound wave transition settling zone ash hopper 6; the electric field electric charge coagulation area 7 comprises a pulse electric charge coagulation area 23 and a direct-current bipolar coagulation dust collection area 24, and the bottom of the electric field electric charge coagulation area 7 is provided with an electric field electric charge coagulation area ash bucket 8; a positive pulse high-voltage wire 18 and a planar electrode plate 20 are arranged in the pulse charge coagulation area 23, and a positive direct current high-voltage wire 17, an electric insulating plate 21 and a movable grid plate 22 are arranged in the direct current bipolar coagulation dust collection area 24; the top of the sound wave mixing and merging area 9 is provided with a sound wave generator 16, and the bottom of the sound wave mixing and merging area 9 is provided with a sound wave mixing and merging area ash bucket 10; a negative direct current high voltage wire 14 and a movable electrode plate 19 are arranged in the direct current dust collecting area 11, and a direct current dust collecting area dust hopper 12 is arranged at the bottom of the direct current dust collecting area 11.
In this embodiment, the pre-dust-collecting area 3, the pulse charge coagulation area 23, the dc bipolar coagulation dust-collecting area 24, and the dc dust-collecting area 11 adopt a box structure having the same cross-sectional structure and size, and the pre-dust-collecting area 3, the dc bipolar coagulation dust-collecting area 24, and the dc dust-collecting area 11 adopt a series arrangement mode in which the center lines of the flow channels coincide.
In this embodiment, the pulse charge coagulation area 23, the dc bipolar coagulation dust collection area 24, and the dc dust collection area 11 are equal-length box structures, and the number of electric fields is preferably greater than the number of electric fields in the pre-dust collection area 3. To enhance the dust removing effect, the size of the dc dust collecting area 11 can be appropriately increased, and the number of electric fields can be increased.
In this embodiment, the electric field electric charge merging region 7 includes two identical pulse electric charge merging regions 23 and one dc bipolar merging dust collecting region 24, one dc bipolar merging dust collecting region 24 is located between two identical pulse electric charge merging regions 23, the pulse electric charge merging regions 23 and the dc bipolar merging dust collecting regions 24 are arranged in parallel, and the flow channel center lines of the pulse electric charge merging regions 23 and the dc bipolar merging dust collecting regions 24 are located on the same horizontal layer.
In this embodiment, the acoustic wave transition settling zone 5 and the acoustic wave mixing and merging zone 9 are symmetrically arranged on both sides of the electric field charge merging zone 7, the sound generating devices of the acoustic wave generators 16 respectively face the acoustic wave transition settling zone ash bucket 6 and the acoustic wave mixing and merging zone ash bucket 10, and the center lines of the two acoustic wave generators 16 coincide with the center lines of the flow channels of the pre-dust-collecting zone 3, the direct-current bipolar condensation and dust-collecting zone 24 and the direct-current dust-collecting zone 11.
In this embodiment, the negative dc high-voltage wire 14, the positive dc high-voltage wire 17, and the positive pulse high-voltage wire 18 are all made of stainless steel material, and the negative dc high-voltage wire 14, the positive dc high-voltage wire 17, and the positive pulse high-voltage wire 18 are arranged in parallel along the flow direction; the negative direct current high-voltage wire 14 and the positive direct current high-voltage wire 17 both adopt barbed wire electrodes, and barbs are radially distributed on the electrodes at equal intervals; the negative direct-current high-voltage wire 14 is connected with an external negative direct-current high-voltage power supply, and the positive direct-current high-voltage wire 17 is connected with an external positive direct-current high-voltage power supply; the positive pulse high voltage wire 18 is a smooth vertical wire electrode and is connected with an external high voltage positive pulse power supply.
In the embodiment, the direct current dust collecting plate 15, the movable electrode plate 19, the planar electrode plate 20 and the electric insulating plate 21 are arranged in parallel along the flow channel direction, and the movable grid plate 22 is arranged perpendicular to the flow channel direction; the direct current dust collection plate 15, the movable electrode plate 19, the planar electrode plate 20 and the movable grid plate 22 are all made of stainless steel materials, and the electric insulation plate 21 is made of electric insulation materials; the direct current dust collecting plate 15 and the movable electrode plate 19 are preferably C-type dust collecting electrode plates, and the plane electrode plate 20 and the electric insulating plate 21 are smooth plane electrode plates; the moving grid plate 22 is in a multi-layer grid staggered arrangement.
In this embodiment, the method for removing fine particulate matters by using the device for efficiently removing fine particulate matters in multiple field partitions comprises the following steps:
the first step is as follows: the starting device comprises: starting the sound wave generator 16 to form a vertically through sound field inside the sound wave transition settling zone 5 and the sound wave mixing and merging zone 9; the negative direct current high-voltage wire 14, the positive direct current high-voltage wire 17 and the positive pulse high-voltage wire 18 are respectively electrified;
the second step is that: aerosol particles enter a reactor through an aerosol inlet 1, then form aerosol with uniformly distributed velocity fields and concentration fields under the action of an air distribution plate 2, and then enter a pre-dust collection area 3;
the third step: aerosol pre-dust collection: applying negative direct current high voltage on a negative direct current high voltage wire 14, forming violent pointed corona discharge on a prickle tip of the wire, forming a stable electric field in a region between the wire and a direct current dust collecting plate 15, simultaneously existing a large amount of positive ions, negative ions and high-energy free electrons in a narrow corona region, enabling particles in the corona region to be charged with different polarities in two modes of electric field migration charging and free diffusion charging, and enabling the charged particles to mutually collide and coalesce through diffusion and coulomb effect; outside the corona area, negative ions and free electrons exist at the same time, particulate matters are charged with the same polarity in two modes of electric field migration charge and free diffusion charge, and part of charged particles are mutually collided and condensed through diffusion; the coagulated particles move towards the direct current dust collecting plate 15 under the action of electric field migration, most of the particles with large particle sizes are collected on the direct current dust collecting plate 15, and the particles are flushed into the dust hopper 4 of the pre-dust collecting area through the action of dust removal, so that the stability of an electric field is maintained;
the fourth step: aerosol after pre-dust collection enters the sound wave transition settling zone 5, the flow velocity of the aerosol is reduced along with the gradual increase of the cross section of the flow channel, vortex turbulence is locally formed, the collision and coalescence action among particles is enhanced, and the vertically through sound field further promotes the collision and coalescence among the particles through the sound field action; the coagulated large-particle-size particles enter an ash bucket 6 of an acoustic transition settling area along with gravity settling in a low-flow-speed state, the rest of large-particle-size particles and part of small-particle-size particles enter a direct-current bipolar coagulation dust collection area 24 under the action of inertia, and the rest of small-particle-size particles enter a pulse charge coagulation area 23 along with diffusion airflow in an acoustic transition settling area 5; because the flow field resistance in the direct-current bipolar coagulation dust collection area 24 is increased by moving the grid plate 22, low-speed airflow is formed in the direct-current bipolar coagulation dust collection area 24, and relatively high-speed airflow is formed in the pulse charge coagulation area 23 with relatively smooth flow channels, so that the action effect of a virtual impactor is generated in the sound wave transition settling area 5 and the electric field charge coagulation area 7;
the fifth step: direct current bipolar coagulation and dust collection: the positive direct current high voltage is applied to the positive direct current high voltage electric wire 17, sharp pointed corona discharge is formed on the prickle point of the electric wire, a stable electric field is formed in the area between the electric wire and the movable grid plate 22, and the action direction of the electric field force in the area is basically vertical to the pre-dust-collecting area 3, so that the particulate matters which are discharged from the pre-dust-collecting area 3, pass through the sound wave transition settling area 5 and have partial negative charges are subjected to the action of the electric field force and do migration movement towards the direction of the positive direct current high voltage electric wire 17, the charge is carried out again, and meanwhile, the collision and coagulation among the particulate matters are promoted; in addition, a large number of positive ions, negative ions and high-energy free electrons exist in a narrow corona region at the same time, particles in the corona region are charged with different polarities in an electric field migration charging mode and a free diffusion charging mode, and the charged particles are mutually collided and condensed through diffusion and coulomb effect; a large amount of positive ions exist outside the corona area, particulate matters are charged with the same polarity in two modes of electric field migration charge and free diffusion charge, and part of charged particles are mutually collided and condensed through diffusion; the relatively low-speed airflow environment in the direct-current bipolar coagulation dust collection area 24 further promotes the collision coagulation effect among the particles; the coagulated particles move towards the movable grid plate 22 under the action of electric field migration, most of the particles with large particle sizes are collected on the movable grid plate 22, the particles are flushed into the electric field charge coagulation area dust hopper 8 under the action of circulating movement dust removal of the movable grid plate 22, dust deposition on the surface of the movable grid plate 22 is avoided, the electric field stability is maintained, back corona and secondary dust raising are avoided, and the dust collection efficiency is improved;
and a sixth step: pulse charge coagulation: the positive pulse high-voltage wire 18 generates streamer corona discharge after applying positive pulse high voltage electricity, a corona region can run through positive and negative electrodes, a large number of high-energy electrons and positive and negative ions exist in a streamer channel, the charge capacity of the electrons is stronger than that of the ions, the number of the positive ions is more than that of the negative ions, migration diffusion charge of the electrons and diffusion charge of the ions exist in the whole pulse period, so that particles with different sizes are charged with charges with different polarities, and the charged particles collide and coalesce through diffusion and coulomb interaction; the coagulated particles move towards the planar electrode plate 20 under the action of electric field migration, most of the particles with large particle size are collected on the planar electrode plate 20, and the particles are flushed into an electric field charge coagulation area ash bucket 8 through the action of ash removal, so that the stability of the electric field is maintained;
the seventh step: the particles with negative charges from the pulse charge coagulation area 23 and the particles with positive charges from the direct current bipolar coagulation dust collection area 24 enter the sound wave mixing coagulation area 9, the particles with different charge polarities on one hand collide and coagulate with each other through coulomb action and diffusion action to form particles with large particle size, on the other hand, the vertically through sound field further promotes the collision and coagulation among the particles through the action of a sound field, the cross section of a flow channel is gradually narrowed, the aerosol from the pulse charge coagulation area 23 forms a whirling airflow to promote the collision and coagulation with the aerosol particles from the direct current bipolar coagulation dust collection area 24, the coagulated particles with large particle size enter the dust hopper 10 of the sound wave mixing coagulation area along with gravity settlement, and the rest aerosol particles enter the direct current dust collection area 11;
eighth step: d, direct current dust collection: applying negative direct current high voltage on a negative direct current high voltage wire 14, forming violent pointed corona discharge on a prickle tip of the wire, forming a stable electric field in a region between the wire and a movable electrode plate 19, simultaneously existing a large amount of positive ions, negative ions and high-energy free electrons in a narrow corona region, enabling particles in the corona region to be charged with different polarities in two modes of electric field migration charging and free diffusion charging, and enabling the charged particles to mutually collide and coalesce through diffusion and coulomb interaction; outside the corona area, negative ions and free electrons exist at the same time, particulate matters are charged with the same polarity in two modes of electric field migration charge and free diffusion charge, and part of charged particles are mutually collided and condensed through diffusion; the particle after the coagulation moves to the movable electrode plate 19 under the action of electric field migration, the particle is collected on the movable electrode plate 19, and the particle is flushed into the dust hopper 12 of the direct current dust collection area through the movable dust removal action of the electrode plate, so that the removal process of aerosol particle is completed, dust deposition cannot be formed on the surface of the movable electrode plate 19, the electric field is maintained stable, back corona and secondary dust raising are avoided, and the dust collection efficiency is improved.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (7)
1. A device for efficiently removing fine particles in multiple field partitions is characterized by comprising an aerosol inlet (1), an air distribution plate (2), a pre-dust collection area (3), a sound wave transition settling area (5), an electric field charge coagulation area (7), a sound wave mixed coagulation area (9), a direct current dust collection area (11) and an aerosol outlet (13), the aerosol inlet (1), the air distribution plate (2), the pre-dust collection area (3), the acoustic wave transition settling area (5), the electric field charge coagulation area (7), the acoustic wave mixed coagulation area (9), the direct current dust collection area (11) and the aerosol outlet (13) are sequentially arranged from left to right, the aerosol inlet (1), the air distribution plate (2), the pre-dust collection area (3), the sound wave transition settling area (5), the electric field charge coagulation area (7), the sound wave mixed coagulation area (9), the direct current dust collection area (11) and the aerosol outlet (13) are communicated in sequence; a negative direct-current high-voltage wire (14) and a direct-current dust collecting plate (15) are arranged in the pre-dust collecting area (3), and a pre-dust collecting area ash hopper (4) is arranged at the bottom of the pre-dust collecting area (3); the top of the sound wave transition settling zone (5) is provided with a sound wave generator (16), and the bottom of the sound wave transition settling zone (5) is provided with a sound wave transition settling zone ash hopper (6); the electric field charge coagulation area (7) comprises a pulse charge coagulation area (23) and a direct-current bipolar coagulation dust collection area (24), and the bottom of the electric field charge coagulation area (7) is provided with an electric field charge coagulation area ash bucket (8); a positive pulse high-voltage wire (18) and a planar electrode plate (20) are arranged in the pulse charge coagulation area (23), and a positive direct current high-voltage wire (17), an electric insulating plate (21) and a movable grid plate (22) are arranged in the direct current bipolar coagulation dust collection area (24); the top of the sound wave mixing and merging area (9) is provided with a sound wave generator (16), and the bottom of the sound wave mixing and merging area (9) is provided with a sound wave mixing and merging area ash bucket (10); the direct current dust collection device is characterized in that a negative direct current high-voltage wire (14) and a movable electrode plate (19) are arranged in the direct current dust collection area (11), and a direct current dust collection area dust hopper (12) is arranged at the bottom of the direct current dust collection area (11).
2. The device for removing fine particulate matters in multiple fields and regions in high efficiency according to claim 1, wherein the pre-dust-collecting region (3), the pulse charge coagulation region (23), the direct current bipolar coagulation dust-collecting region (24) and the direct current dust-collecting region (11) adopt box structures with the same cross-sectional structures and sizes, and the pre-dust-collecting region (3), the direct current bipolar coagulation dust-collecting region (24) and the direct current dust-collecting region (11) adopt a series arrangement mode that the center lines of flow channels are overlapped.
3. The device for removing fine particulate matters in multiple fields and regions in high efficiency as claimed in claim 2, wherein the pulse charge coagulation region (23), the direct current bipolar coagulation dust collection region (24) and the direct current dust collection region (11) are of equal-length box structures, and the number of electric fields is greater than that of electric fields in the pre-dust collection region (3).
4. The device for removing fine particulate matters efficiently in multiple fields and regions according to claim 1, wherein the electric field charge coagulation region (7) comprises two identical pulse charge coagulation regions (23) and one direct current bipolar coagulation dust collection region (24), the direct current bipolar coagulation dust collection region (24) is located between the two identical pulse charge coagulation regions (23), the pulse charge coagulation regions (23) and the direct current bipolar coagulation dust collection region (24) are arranged in parallel, and flow channel center lines of the pulse charge coagulation regions (23) and the direct current bipolar coagulation dust collection region (24) are located on the same horizontal layer.
5. The device for efficiently removing fine particulate matters in multiple fields and regions according to claim 1, wherein the sound wave transition settling region (5) and the sound wave mixing and merging region (9) are symmetrically arranged on two sides of the electric field charge condensing region (7), sound generating devices of the sound wave generators (16) respectively face the dust hopper (6) of the sound wave transition settling region and the dust hopper (10) of the sound wave mixing and merging region, and the central lines of the two sound wave generators (16) coincide with the central lines of flow channels of the pre-dust collecting region (3), the direct current bipolar condensing and dust collecting region (24) and the direct current dust collecting region (11).
6. The device for removing fine particulate matters in multiple fields and regions with high efficiency as claimed in claim 1, wherein the negative direct current high voltage wire (14), the positive direct current high voltage wire (17) and the positive pulse high voltage wire (18) are made of stainless steel materials, and the negative direct current high voltage wire (14), the positive direct current high voltage wire (17) and the positive pulse high voltage wire (18) are arranged in parallel along the flow direction; the negative direct-current high-voltage wire (14) and the positive direct-current high-voltage wire (17) both adopt barbed wire electrodes, and barbs are radially distributed on the electrodes at equal intervals; the negative direct-current high-voltage wire (14) is connected with an external negative direct-current high-voltage power supply, and the positive direct-current high-voltage wire (17) is connected with an external positive direct-current high-voltage power supply; the positive pulse high-voltage wire (18) adopts a smooth vertical wire electrode and is connected with an external high-voltage positive pulse power supply.
7. The device for removing fine particulate matters efficiently in multiple fields and regions according to claim 1, wherein the direct current dust collecting plate (15), the movable electrode plate (19), the planar electrode plate (20) and the electric insulating plate (21) are arranged in parallel along the flow channel direction, and the movable grid plate (22) is arranged perpendicular to the flow channel direction; the direct current dust collection plate (15), the movable electrode plate (19), the planar electrode plate (20) and the movable grid plate (22) are all made of stainless steel materials, and the electric insulation plate (21) is made of electric insulation materials; the direct current dust collecting plate (15) and the movable electrode plate (19) adopt C-shaped dust collecting electrode plates, and the plane electrode plate (20) and the electric insulating plate (21) adopt smooth plane electrode plates; the movable grid plate (22) adopts a multi-layer grid staggered arrangement mode.
Priority Applications (1)
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| CN111097251A (en) * | 2019-12-13 | 2020-05-05 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particles in multi-field subareas |
| CN111097251B (en) * | 2019-12-13 | 2023-05-23 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particles in multiple-field subareas |
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