CN212731584U - Device of high-efficient desorption of temperature and humidity regulation and control fine particles thing - Google Patents
Device of high-efficient desorption of temperature and humidity regulation and control fine particles thing Download PDFInfo
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- CN212731584U CN212731584U CN201922238917.6U CN201922238917U CN212731584U CN 212731584 U CN212731584 U CN 212731584U CN 201922238917 U CN201922238917 U CN 201922238917U CN 212731584 U CN212731584 U CN 212731584U
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Abstract
The utility model discloses a device for efficiently removing fine particulate matters through temperature and humidity regulation, which adopts a box body structure with the same cross section structure size, and adopts a series arrangement mode of flow channel center line coincidence for a main body channel, and strengthens collision and condensation effects of the fine particulate matters by combining gravity settling, filtering and trapping effects, condensation and nucleation effects and acoustoelectric coupling effects through the modes of negative direct current pre-dust removal, primary flue gas temperature and humidity regulation, acoustoelectric coupling coagulation, secondary flue gas temperature and humidity regulation and back negative direct current dust removal; through the series connection effect of the two-stage flue gas temperature and humidity regulation and control dust collection area and the coupling effect of sound agglomeration and pulse electric coagulation, the local regulation and control of the flue gas temperature and the gradual humidification of the humidity are realized, the subarea electric coagulation effect of particulate matters with different particle sizes is realized, the trapping and removing effects of the fine particulate matters are enhanced through the dust cleaning and collecting effects of the movable grid plate and the movable electrode plate, and the fine particulate matter removing efficiency is high.
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 warm and humid regulation and control 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 people are influencedThe people normally go out. 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, the blocking capability of a human body to the fine particles is limited, so that the fine particles can enter respiratory tracts of the human body and be deposited in alveoli, and the heavy metals in the fine particles can enter blood of the human body, so that diseases in aspects of asthma, bronchus, cardiovascular diseases and the like are caused, and the health of the human body is harmed.
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. In addition, the application of the existing low-low temperature electric dust remover shows that the flue gas cooling in a certain range is beneficial to improving the dust removal efficiency of the electrostatic dust remover.
Therefore, it is necessary to develop a novel efficient fine particle removal device based on the sound-electricity agglomeration coupling effect of flue gas temperature and humidity regulation.
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 temperature and humidity regulation and control fine particles matter that structural design is reasonable, desorption efficiency is high.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a device of high-efficient desorption of temperature and humidity regulation and control fine particles which characterized in that: the device comprises an aerosol inlet, an air distribution plate, a pre-dust collection area, a primary regulation and control dust collection area, a circulating pump, an acoustoelectric coupling condensation area, a secondary regulation and control dust collection area, a direct-current dust collection area and an aerosol outlet; the aerosol inlet, the air distribution plate, the pre-dust collection area, the primary regulation and control dust collection area, the acoustoelectric coupling condensation area, the secondary regulation and control dust collection 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 primary regulation and control dust collection area, the acoustoelectric coupling condensation area, the secondary regulation and control dust collection 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; a primary grid plate and a flue gas cooling heat exchanger are arranged in the primary regulation and control dust collection area, and a primary grid plate ash removal device and a primary regulation and control dust collection area washing tank are arranged at the bottom of the primary regulation and control dust collection area; a positive pulse high-voltage wire and a planar electrode plate are arranged in the acoustoelectric coupling condensation area, a sound wave generator is arranged at the top of the acoustoelectric coupling condensation area, and an acoustoelectric coupling condensation area ash bucket is arranged at the bottom of the acoustoelectric coupling condensation area; a second-stage grid plate and a flue gas heating heat exchanger are arranged in the second-stage regulation dust collection area, and a second-stage grid plate ash removal device and a second-stage regulation dust collection area washing tank are arranged at the bottom of the second-stage regulation dust collection area; a negative direct-current high-voltage wire and a movable electrode plate are arranged in the direct-current dust collection area, and a direct-current dust collection area dust hopper is arranged at the bottom of the direct-current dust collection area; and the circulating pump is communicated with the flue gas cooling heat exchanger and the flue gas heating heat exchanger through pipelines.
Preferably, the pre-dust-collecting area, the primary regulation and control dust-collecting area, the acoustoelectric coupling condensation area, the secondary regulation and control dust-collecting area and the direct-current dust-collecting area adopt box body structures with the same cross section structure and size, and adopt a series arrangement mode that the center lines of the flow channels are overlapped.
Preferably, the acoustoelectric coupling condensation area and the direct-current dust collecting 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 collecting 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 primary and secondary dust collection areas are symmetrically arranged on two sides of the acoustoelectric coupling condensation area, and the primary and secondary dust collection areas preferably adopt the same structure.
Preferably, the flue gas cooling heat exchanger and the flue gas heating heat exchanger are both arranged in a direction perpendicular to the flow channel, and both adopt a coil structure made of corrosion-resistant and wear-resistant materials, a preferred heat exchange medium in the coil is water, a water outlet of the flue gas cooling heat exchanger is mutually communicated with a water inlet of the flue gas heating heat exchanger through a pipeline, and a water inlet of the flue gas cooling heat exchanger is mutually communicated with a water outlet of the flue gas heating heat exchanger through a pipeline; the heat exchange medium in the flue gas cooling heat exchanger flows from bottom to top, and the heat exchange medium in the flue gas heating heat exchanger flows from top to bottom; the circulating pump is arranged between the water outlet of the flue gas heating heat exchanger and the water inlet of the flue gas cooling heat exchanger.
Preferably, the primary grid plate and the secondary grid plate are both of a multi-layer grid staggered arrangement structure made of corrosion-resistant and wear-resistant materials and are uniformly distributed in a direction perpendicular to the flow channel to form a circulating movement mode, wherein the windward surface of the primary grid plate and the windward surface of the secondary grid plate are both of a structure moving from top to bottom, and the leeward surface of the primary grid plate and the leeward surface of the secondary grid plate are both of a structure moving from bottom to top; a flue gas cooling heat exchanger is arranged in the circulating cavity of the first-stage grid plate, and a flue gas heating heat exchanger is arranged in the circulating cavity of the second-stage grid plate; the bottom end face of the primary grid plate extends into the primary regulation and control dust collection area washing pool, and the primary grid plate ash removal device is suspended on the surface of the primary regulation and control dust collection area washing pool and acts on the inner side of the bottom end face of the primary grid plate; the bottom end face of the second-stage grid plate extends into the second-stage regulation and control dust collection area washing pool, and the second-stage grid plate ash removal device is suspended on the surface of the second-stage regulation and control dust collection area washing pool and acts on the inner side of the bottom end face of the second-stage grid plate.
Preferably, a single positive pulse high-voltage wire is positioned at the center of a single sound generator; the sound wave generators are sequentially arranged at the top of the acoustoelectric coupling coalescence area along the flow channel direction, and the center lines of the sound wave generators are overlapped with the center line of the flow channel.
Preferably, the negative direct current high-voltage wire and the positive pulse high-voltage wire are arranged in parallel along the flow direction; the negative direct-current high-voltage wire adopts a barbed wire electrode structure made of stainless steel materials, barbs are radially distributed on the electrode at equal intervals, and the negative direct-current high-voltage wire is connected with an external negative direct-current high-voltage power supply; the positive pulse high-voltage wire is of a smooth vertical wire electrode structure made of corrosion-resistant materials and is connected with an external high-voltage positive pulse power supply.
Preferably, the direct current dust collecting plate, the planar electrode plate and the movable electrode plate are arranged in parallel along the flow direction; the direct current dust collection plate and the movable electrode plate are made of stainless steel materials, and the planar electrode plate is made of corrosion-resistant and wear-resistant materials; c-shaped dust collecting electrode plates are preferably adopted by the direct current dust collecting plate and the movable electrode plate, and smooth plane electrode plates are adopted by the plane electrode plates.
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 flow channel central lines, so that the smoothness of an aerosol particle channel flow field is kept, and dust deposition and scaling in a local area are avoided.
2. The arrangement modes of pre-dedusting, primary flue gas temperature and humidity control, acoustoelectric coupling coagulation, secondary flue gas temperature and humidity control and post-electrostatic dedusting are adopted, the effects of gravity settling and filtering and trapping are combined, the collision coagulation effect of fine particles is enhanced through the condensation nucleation effect, multiple electric coagulation modes and the acoustoelectric effect, and the partition series connection effect gradually realizes the efficient removal of the particles with large and small particle sizes.
3. The pre-dedusting and moving grid plate is arranged before the acoustoelectric coupling 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. Through the combination of the first-level regulation and control dust collecting area and the second-level regulation and control dust collecting area, on one hand, the local regulation and control of the flue gas temperature are realized, and on the other hand, the gradual humidification of the flue gas humidity is realized, so that condensable particles in the flue gas are gradually condensed, the condensation and the removal of fine particles are strengthened, and the corrosion influence on a dust removal system is reduced.
5. Through the antithetical couplet of one-level grid plate and flue gas cooling heat exchanger, realized the cooling humidification of flue gas, the flue gas after the cooling can reflect the promotion effect of steam to slight particulate matter nucleation better to promoted the coagulation and desorption effect of particulate matter, the flue gas cooling has reduced the flue gas volume simultaneously, has promoted the entrapment desorption of particulate matter indirectly, has avoided the excessive wearing and tearing of large-grain diameter particulate matter to flue gas cooling heat exchanger again simultaneously.
6. Through the coupling effect of the transverse pulse corona discharge electric field and the vertical sound field, the superposition of the multi-purpose coagulation effect among the fine particles is realized, and the coagulation effect of the particles is promoted.
7. Through the combination of the secondary grid plate and the flue gas heating heat exchanger, the temperature rise and humidification of the flue gas are realized, the flue gas after temperature rise is prevented from being condensed by water vapor so as to influence the tail end heating surface, and the humidified flue gas can promote the trapping and removal of particulate matters.
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 temperature and humidity regulated fine particles effectively combines electrostatic dust collection, pulse electrocoagulation, sound wave agglomeration and flue gas temperature and humidity regulation, promotes the stage-by-stage graded agglomeration and removal of the particles with different particle sizes by adopting a local temperature control and graded humidification mode, 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, thermophoretic force, liquid bridge force, solid bridge force and the like, and finally realizes efficient removal through an electrostatic dust removal technology, the particle application range is wide, the fine particle removal efficiency is high, and the stable operation time of the system is longer.
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.
Fig. 3 is a schematic view of a front view structure of the one-level dust collecting area according to an embodiment of the present invention.
Fig. 4 is a schematic view of the second-level dust collecting area according to the 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 negative direct-current high-voltage wire 4, a direct-current dust collection plate 5, a pre-dust collection area ash bucket 6, a primary regulation and control dust collection area 7, a primary grid plate 8, a flue gas cooling heat exchanger 9, a primary grid plate ash removal device 10, a primary regulation and control dust collection area washing pool 11, a circulating pump 12, an acoustoelectric coupling coagulation area 13, a sound wave generator 14, a positive pulse high-voltage wire 15, a planar electrode plate 16, an acoustoelectric coupling coagulation area ash bucket 17, a secondary regulation and control dust collection area 18, a secondary grid plate 19, a flue gas heating heat exchanger 20, a secondary grid plate ash removal device 21, a secondary regulation and control dust collection area washing pool 22, a direct-current dust collection area 23, a movable electrode plate 24, a direct-current dust collection.
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 to 4, in the present embodiment, the device for efficiently removing fine particulate matters through temperature and humidity regulation includes an aerosol inlet 1, an air distribution plate 2, a pre-dust collection area 3, a primary regulation dust collection area 7, a circulating pump 12, an acoustoelectric coupling condensation area 13, a secondary regulation dust collection area 18, a direct current dust collection area 23, and an aerosol outlet 26; the aerosol inlet 1, the air distribution plate 2, the pre-dust collection area 3, the primary regulation and control dust collection area 7, the acoustoelectric coupling condensation area 13, the secondary regulation and control dust collection area 18, the direct current dust collection area 23 and the aerosol outlet 26 are sequentially arranged from left to right, and the aerosol inlet 1, the air distribution plate 2, the pre-dust collection area 3, the primary regulation and control dust collection area 7, the acoustoelectric coupling condensation area 13, the secondary regulation and control dust collection area 18, the direct current dust collection area 23 and the aerosol outlet 26 are sequentially communicated;
in the embodiment, a negative direct current high-voltage wire 4 and a direct current dust collecting plate 5 are arranged in the pre-dust collecting area 3, and a pre-dust collecting area dust hopper 6 is arranged at the bottom of the pre-dust collecting area 3; a primary grid plate 8 and a flue gas cooling heat exchanger 9 are arranged in the primary regulation dust collection area 7, and a primary grid plate ash removal device 10 and a primary regulation dust collection area washing tank 11 are arranged at the bottom of the primary regulation dust collection area 7; a positive pulse high-voltage wire 15 and a planar electrode plate 16 are arranged in the acoustoelectric coupling condensation area 13, a sound wave generator 14 is arranged at the top of the acoustoelectric coupling condensation area 13, and an acoustoelectric coupling condensation area ash hopper 17 is arranged at the bottom of the acoustoelectric coupling condensation area 13; a secondary grid plate 19 and a flue gas heating heat exchanger 20 are arranged in the secondary regulation dust collection area 18, and a secondary grid plate ash removal device 21 and a secondary regulation dust collection area washing tank 22 are arranged at the bottom of the secondary regulation dust collection area 18; a negative direct-current high-voltage wire 4 and a movable electrode plate 24 are arranged in the direct-current dust collecting area 23, and a direct-current dust collecting area dust hopper 25 is arranged at the bottom of the direct-current dust collecting area 23; the circulating pump 12 is communicated with the flue gas cooling heat exchanger 9 and the flue gas heating heat exchanger 20 through pipelines.
In this embodiment, the pre-dust-collecting area 3, the primary regulation and control dust-collecting area 7, the acoustoelectric coupling condensation area 13, the secondary regulation and control dust-collecting area 18, and the direct-current dust-collecting area 23 adopt box structures with the same cross-sectional structures and sizes, and adopt a series arrangement mode in which the center lines of the flow channels are overlapped.
In this embodiment, the acoustoelectric coupling condensation area 13 and the dc dust collecting area 23 are of equal-length box structures, and the number of electric fields is preferably greater than that of electric fields in the pre-dust collecting area 3. To enhance the dust removing effect, the size of the dc dust collecting area 23 can be appropriately increased, and the number of electric fields can be increased.
In this embodiment, the primary dust collection area 7 and the secondary dust collection area 18 are symmetrically arranged on both sides of the acoustoelectric coupling condensation area 13, and the primary dust collection area 7 and the secondary dust collection area 18 preferably have the same structure.
In this embodiment, the flue gas cooling heat exchanger 9 and the flue gas heating heat exchanger 20 are both arranged perpendicular to the direction of the flow channel, and both adopt a coil structure made of corrosion-resistant and wear-resistant materials, the preferred heat exchange medium in the coil is water, the water outlet of the flue gas cooling heat exchanger 9 is mutually communicated with the water inlet of the flue gas heating heat exchanger 20 through a pipeline, and the water inlet of the flue gas cooling heat exchanger 9 is mutually communicated with the water outlet of the flue gas heating heat exchanger 20 through a pipeline; the heat exchange medium in the flue gas cooling heat exchanger 9 flows from bottom to top, and the heat exchange medium in the flue gas heating heat exchanger 20 flows from top to bottom; the circulation pump 12 is arranged between the water outlet of the flue gas heating heat exchanger 20 and the water inlet of the flue gas cooling heat exchanger 9.
In this embodiment, the primary grid plate 8 and the secondary grid plate 19 are both of a multi-layer grid staggered arrangement structure made of corrosion-resistant and wear-resistant materials, and are uniformly distributed in a direction perpendicular to the flow channel to form a circular movement form, wherein the windward surface of the primary grid plate 8 and the windward surface of the secondary grid plate 19 both have a structure moving from top to bottom, and the leeward surface of the primary grid plate 8 and the leeward surface of the secondary grid plate 19 both have a structure moving from bottom to top; a flue gas cooling heat exchanger 9 is arranged in the circulating cavity of the first-stage grid plate 8, and a flue gas heating heat exchanger 20 is arranged in the circulating cavity of the second-stage grid plate 19; the bottom end face of the primary grid plate 8 extends into the primary regulation and control dust collection area washing pool 11, and the primary grid plate ash removal device 10 is suspended on the surface of the primary regulation and control dust collection area washing pool 11 and acts on the inner side of the bottom end face of the primary grid plate 8; the bottom end face of the secondary grid plate 19 extends into the secondary regulation and control dust collection area washing pool 22, and the secondary grid plate ash removal device 21 is suspended on the surface of the secondary regulation and control dust collection area washing pool 22 and acts on the inner side of the bottom end face of the secondary grid plate 19.
In this embodiment, a single positive pulse high voltage wire 15 is located at the center of a single sound generator 14; the plurality of sound wave generators 14 are sequentially arranged on the top of the acoustoelectric coupling condensation area 13 along the flow channel direction, and the central lines of the plurality of sound wave generators 14 are overlapped with the central line of the flow channel.
In the embodiment, the negative direct current high-voltage wire 4 and the positive pulse high-voltage wire 15 are arranged in parallel along the flow direction; the negative direct-current high-voltage wire 4 is of a stainless steel prickle wire electrode structure, prickles are radially distributed on the electrode at equal intervals, and the negative direct-current high-voltage wire 4 is connected with an external negative direct-current high-voltage power supply; the positive pulse high-voltage wire 15 is of a smooth vertical wire electrode structure made of corrosion-resistant materials, and the positive pulse high-voltage wire 15 is connected with an external high-voltage positive pulse power supply.
In the embodiment, the direct current dust collecting plate 5, the planar electrode plate 16 and the movable electrode plate 24 are arranged in parallel along the flow direction; the direct current dust collecting plate 5 and the movable electrode plate 24 are both made of stainless steel materials, and the planar electrode plate 16 is made of corrosion-resistant and wear-resistant materials; the direct current dust collecting plate 5 and the movable electrode plate 24 are preferably C-type dust collecting electrode plates, and the planar electrode plate 16 is a smooth planar electrode plate.
In this embodiment, the method for removing fine particulate matters by using the device for efficiently removing fine particulate matters by temperature and humidity control includes the following steps:
the first step is as follows: the starting device comprises: starting the sound wave generator 14 to enable the interior of the acoustoelectric coupling condensation area 13 to form a vertically through sound field; the negative direct current high-voltage wire 4 and the positive pulse high-voltage wire 15 are respectively electrified, and the primary grid plate 8, the secondary grid plate 19 and the movable electrode plate 24 are respectively started; starting the circulating pump 12 to make the heat exchange media in the flue gas cooling heat exchanger 9 and the flue gas heating heat exchanger 20 circularly flow;
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 4, 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 5, simultaneously storing a large amount of positive ions, negative ions and high-energy free electrons in a narrow corona region, carrying out heteropolar charging on particles in the corona region in two modes of electric field migration charging and free diffusion charging, and mutually colliding and condensing the charged particles 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 5 under the action of electric field migration, most of the particles with large particle sizes are collected on the direct current dust collecting plate 5, and the particles are flushed into an ash hopper 6 of a pre-dust collecting area through the action of ash removal, so that the stability of an electric field is maintained;
the fourth step: the aerosol after pre-dust collection enters a primary regulation dust collection area 7, particulate matters still with partial charges move to the windward side of a primary grid plate 8 under the action of an electric field force between a negative direct-current high-voltage wire 4 and the windward side of the primary grid plate 8, meanwhile, particulate matters not carrying charges move to the windward side of the primary grid plate 8 under the action of the flow field force, large-particle-size particulate matters are collected to the windward side of the primary grid plate 8 and circularly move with the primary grid plate 8 to enter a primary regulation dust collection area washing tank 11 to be washed by ash, no ash deposit is formed on the surface of the primary grid plate 8, the smoke resistance is prevented from being further increased, and meanwhile, the leeward side of the primary grid plate 8 carries water vapor to enter a smoke flow channel; the heat exchange medium flows through the interior of the heat exchange coil of the flue gas cooling heat exchanger 9 from bottom to top, so that the aerosol is cooled through the flue gas cooling heat exchanger 9 after penetrating through the windward side of the primary grid plate 8, the heated heat exchange medium enters the flue gas heating heat exchanger 20 through a pipeline, the cooled aerosol promotes the formation of condensable particles due to the nucleation of small-particle-size particles, and then the aerosol is further agglomerated and grown under the action of water vapor on the leeward side of the primary grid plate 8 and then enters the acousto-electric coupling condensation zone 13;
the fifth step: acoustic-electric coupling coagulation: the positive pulse high-voltage wire 15 generates streamer corona discharge after applying positive pulse high voltage electricity, a corona region can penetrate through a positive electrode and a negative electrode, 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; meanwhile, the humidified flue gas further strengthens the effect of pulse corona discharge and promotes the charge coagulation of particulate matters; in addition, the vertically through sound field formed by the sound generator 14 further promotes the collision and coalescence among the particulate matters through the action of the sound field; the coagulated particles move towards the planar electrode plate 16 under the action of electric field migration, most of the particles with large particle sizes are collected on the planar electrode plate 16, and the particles are flushed into an ash hopper 17 in an acoustoelectric coupling coagulation area through the action of ash removal, so that the stability of an electric field is maintained;
and a sixth step: the aerosol after the sound-electricity coupling coagulation enters a secondary regulation dust collecting area 18, particulate matters still with partial charges move to the windward side of a secondary grid plate 19 under the action of an electric field force between a positive pulse high-voltage wire 15 and the windward side of the secondary grid plate 19, meanwhile, the particulate matters not carrying the charges move to the windward side of the secondary grid plate 19 under the action of the flow field force, the particulate matters with larger particle sizes are captured to the windward side of the secondary grid plate 19 and circularly move with the secondary grid plate 19 to enter a secondary regulation dust collecting area washing tank 22 to be cleaned and washed, dust accumulation cannot be formed on the surface of the secondary grid plate 19, the smoke resistance is prevented from being further increased, and meanwhile, the leeward side of the secondary grid plate 19 carries water vapor to enter a smoke flow channel; the heat exchange medium flows through the interior of the heat exchange coil of the flue gas heating heat exchanger 20 from top to bottom, so that the aerosol is heated by the flue gas heating heat exchanger 20 after penetrating through the windward side of the secondary grid plate 19, the temperature of the flue gas is basically restored to the initial temperature, the heat exchange medium is cooled and then is conveyed back to the flue gas cooling heat exchanger 9 through the pipeline by the circulating pump 12, and the non-trapped small-particle-size particles are agglomerated and grown under the action of water vapor on the leeward side of the secondary grid plate 19 and then enter the direct-current dust collection area 23;
the seventh step: d, direct current dust collection: applying negative direct current high voltage on a negative direct current high voltage wire 4, 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 24, 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 24 under the action of electric field migration, and is collected on the movable electrode plate 24, and the particle is flushed into the dust hopper 25 of the direct-current dust collection area through the movable dust removal action of the electrode plate, so that the removal process of aerosol particles is completed, dust deposition cannot be formed on the surface of the movable electrode plate 24, 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 (9)
1. The utility model provides a device of high-efficient desorption of temperature and humidity regulation and control fine particles which characterized in that: the device comprises an aerosol inlet (1), an air distribution plate (2), a pre-dust collection area (3), a primary regulation dust collection area (7), a circulating pump (12), an acoustoelectric coupling condensation area (13), a secondary regulation dust collection area (18), a direct-current dust collection area (23) and an aerosol outlet (26); the device comprises an aerosol inlet (1), an air distribution plate (2), a pre-dust collection area (3), a primary regulation dust collection area (7), an acoustoelectric coupling condensation area (13), a secondary regulation dust collection area (18), a direct-current dust collection area (23) and an aerosol outlet (26), wherein the aerosol inlet (1), the air distribution plate (2), the pre-dust collection area (3), the primary regulation dust collection area (7), the acoustoelectric coupling condensation area (13), the secondary regulation dust collection area (18), the direct-current dust collection area (23) and the aerosol outlet (26) are sequentially communicated; a negative direct-current high-voltage wire (4) and a direct-current dust collecting plate (5) are arranged in the pre-dust collecting area (3), and a pre-dust collecting area ash hopper (6) is arranged at the bottom of the pre-dust collecting area (3); a primary grid plate (8) and a flue gas cooling heat exchanger (9) are arranged in the primary regulation dust collection area (7), and a primary grid plate ash removal device (10) and a primary regulation dust collection area washing tank (11) are arranged at the bottom of the primary regulation dust collection area (7); a positive pulse high-voltage wire (15) and a planar electrode plate (16) are arranged in the sound and electricity coupling condensation area (13), a sound wave generator (14) is arranged at the top of the sound and electricity coupling condensation area (13), and a sound and electricity coupling condensation area ash bucket (17) is arranged at the bottom of the sound and electricity coupling condensation area (13); a secondary grid plate (19) and a flue gas heating heat exchanger (20) are arranged in the secondary regulation dust collection area (18), and a secondary grid plate ash removal device (21) and a secondary regulation dust collection area washing tank (22) are arranged at the bottom of the secondary regulation dust collection area (18); a negative direct-current high-voltage wire (4) and a movable electrode plate (24) are arranged in the direct-current dust collection area (23), and a direct-current dust collection area dust hopper (25) is arranged at the bottom of the direct-current dust collection area (23); and the circulating pump (12) is communicated with the flue gas cooling heat exchanger (9) and the flue gas heating heat exchanger (20) through pipelines.
2. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the pre-dust-collecting area (3), the primary regulation and control dust-collecting area (7), the acoustoelectric coupling condensation area (13), the secondary regulation and control dust-collecting area (18) and the direct-current dust-collecting area (23) adopt box body structures with the same cross section structure and size, and adopt a series arrangement mode that the center lines of the flow channels are overlapped.
3. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 2, is characterized in that: the acoustoelectric coupling condensation area (13) and the direct current dust collection area (23) adopt equal-length box structures, and the number of electric fields is greater than that of electric fields in the pre-dust collection area (3).
4. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the primary regulation and control dust collection area (7) and the secondary regulation and control dust collection area (18) are symmetrically arranged on two sides of the acoustoelectric coupling condensation area (13), and the primary regulation and control dust collection area (7) and the secondary regulation and control dust collection area (18) adopt the same structure.
5. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the flue gas cooling heat exchanger (9) and the flue gas heating heat exchanger (20) are both arranged in a direction vertical to a flow channel and are both of a coil structure made of corrosion-resistant and wear-resistant materials, a heat exchange medium in the coil is water, a water outlet of the flue gas cooling heat exchanger (9) is communicated with a water inlet of the flue gas heating heat exchanger (20) through a pipeline, and a water inlet of the flue gas cooling heat exchanger (9) is communicated with a water outlet of the flue gas heating heat exchanger (20) through a pipeline; the heat exchange medium in the flue gas cooling heat exchanger (9) flows from bottom to top, and the heat exchange medium in the flue gas heating heat exchanger (20) flows from top to bottom; the circulating pump (12) is arranged between the water outlet of the flue gas heating heat exchanger (20) and the water inlet of the flue gas cooling heat exchanger (9).
6. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the primary grid plate (8) and the secondary grid plate (19) are both of a multi-layer grid staggered arrangement structure made of corrosion-resistant and wear-resistant materials and are uniformly distributed in a direction perpendicular to the flow channel to form a circulating movement mode, the windward side of the primary grid plate (8) and the windward side of the secondary grid plate (19) are both of a structure moving from top to bottom, and the leeward side of the primary grid plate (8) and the leeward side of the secondary grid plate (19) are both of a structure moving from bottom to top; a flue gas cooling heat exchanger (9) is arranged in the circulating cavity of the first-stage grid plate (8), and a flue gas heating heat exchanger (20) is arranged in the circulating cavity of the second-stage grid plate (19); the bottom end face of the primary grid plate (8) extends into the primary regulation and control dust collection area washing pool (11), and the primary grid plate ash removal device (10) is suspended on the surface of the primary regulation and control dust collection area washing pool (11) and acts on the inner side of the bottom end face of the primary grid plate (8); the bottom end face of the secondary grid plate (19) extends into the secondary regulation and control dust collection area washing pool (22), and the secondary grid plate ash removal device (21) is suspended on the surface of the secondary regulation and control dust collection area washing pool (22) and acts on the inner side of the bottom end face of the secondary grid plate (19).
7. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the single positive pulse high-voltage wire (15) is positioned at the central position of the single sound wave generator (14); the sound wave generators (14) are sequentially arranged at the top of the acoustoelectric coupling condensation area (13) along the flow channel direction, and the central lines of the sound wave generators (14) are superposed with the central line of the flow channel.
8. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the negative direct current high-voltage wire (4) and the positive pulse high-voltage wire (15) are arranged in parallel along the flow direction; the negative direct-current high-voltage wire (4) adopts a stainless steel prickle wire electrode structure, prickles are radially distributed on the electrode at equal intervals, and the negative direct-current high-voltage wire (4) is connected with an external negative direct-current high-voltage power supply; the positive pulse high-voltage wire (15) is of a smooth vertical wire electrode structure made of corrosion-resistant materials, and the positive pulse high-voltage wire (15) is connected with an external high-voltage positive pulse power supply.
9. The device for regulating and controlling the fine particles to be removed efficiently by temperature and humidity according to claim 1, which is characterized in that: the direct current dust collecting plate (5), the plane electrode plate (16) and the moving electrode plate (24) are arranged in parallel along the flow direction; the direct current dust collection plate (5) and the movable electrode plate (24) are made of stainless steel materials, and the planar electrode plate (16) is made of corrosion-resistant and wear-resistant materials; the direct current dust collecting plate (5) and the movable electrode plate (24) adopt C-shaped dust collecting electrode plates, and the plane electrode plate (16) adopts a smooth plane electrode plate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068451A (en) * | 2019-12-13 | 2020-04-28 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particles through temperature and humidity regulation |
| CN113233556A (en) * | 2021-05-20 | 2021-08-10 | 大连海事大学 | Ship ballast water microorganism concentration device and method |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068451A (en) * | 2019-12-13 | 2020-04-28 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particles through temperature and humidity regulation |
| CN111068451B (en) * | 2019-12-13 | 2023-07-14 | 华电电力科学研究院有限公司 | Device and method for efficiently removing fine particulate matters through temperature and humidity regulation |
| CN113233556A (en) * | 2021-05-20 | 2021-08-10 | 大连海事大学 | Ship ballast water microorganism concentration device and method |
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