CN110252511B - Wet electrostatic dust collector - Google Patents

Wet electrostatic dust collector Download PDF

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Publication number
CN110252511B
CN110252511B CN201910436404.8A CN201910436404A CN110252511B CN 110252511 B CN110252511 B CN 110252511B CN 201910436404 A CN201910436404 A CN 201910436404A CN 110252511 B CN110252511 B CN 110252511B
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CN
China
Prior art keywords
conductive fiber
electrode
dust
fiber band
band electrode
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Expired - Fee Related
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CN201910436404.8A
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Chinese (zh)
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CN110252511A (en
Inventor
向晓东
向晓晴
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Wuhan University of Science and Engineering WUSE
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Wuhan University of Science and Engineering WUSE
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Publication of CN110252511A publication Critical patent/CN110252511A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02Plant or installations having external electricity supply
    • B03C3/16Plant or installations having external electricity supply wet type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/36Controlling flow of gases or vapour
    • B03C3/361Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/363Controlling flow of gases or vapour by static mechanical means, e.g. deflector located before the filter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/36Controlling flow of gases or vapour
    • B03C3/361Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/365Controlling flow of gases or vapour by static mechanical means, e.g. deflector located after the filter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/40Electrode constructions
    • B03C3/45Collecting-electrodes
    • B03C3/47Collecting-electrodes flat, e.g. plates, discs, gratings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/74Cleaning the electrodes
    • B03C3/743Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/74Cleaning the electrodes
    • B03C3/78Cleaning the electrodes by washing

Abstract

The invention relates to a wet electrostatic dust collector, comprising: the dust removal device comprises a dust removal box body, a dust hopper, a dust collection assembly, a corona polar wire and a power supply device; the dust removal box body is provided with an air inlet and an air outlet, and the hopper opening of the ash hopper is upwards arranged on the lower side wall of the dust removal box body; the dust collection assembly comprises a conductive fiber belt electrode, a plurality of upper traction rollers and a plurality of lower traction rollers; the conductive fiber belt electrode is in transmission fit with the upper traction rollers and the lower traction rollers; the corona polar lines are arranged in the enclosed space with the upward opening of the conductive fiber band electrode or the enclosed space with the downward opening of the conductive fiber band electrode; the polarity output end of the power supply device is respectively electrically connected with the conductive fiber band electrode and the corona polar line. The problem of wet electrostatic precipitator's dust collection electrode can't be fully cleaned after the dust absorption and lead to dust collection efficiency low grade is solved.

Description

Wet electrostatic dust collector
Technical Field
The invention relates to the technical field of environment-friendly equipment, in particular to a wet electrostatic dust collection device.
Background
At present, wet electrostatic dust collection is widely applied to chemical industry, metallurgy and purification treatment of flue gas after a desulfurization tower of a coal-fired power plant, and is one of the most effective methods for controlling dust emission.
However, the traditional wet electrostatic dust collection technology still has the problem that most dust collection polar plates adopt metal polar plates in the actual operation process, when the polar plates are washed by water spraying, washing water is unevenly distributed on the polar plates and can generate a 'channeling' phenomenon, and places which cannot be washed by the water are easy to generate scale, so that the dust collection efficiency of a dust collector is affected, and the dust collector breaks down.
Disclosure of Invention
The invention provides a wet electrostatic dust removal device, aiming at solving the problem that the dust collection efficiency is low because a dust collection electrode of the wet electrostatic dust removal device cannot be fully cleaned after dust collection.
The invention provides a wet electrostatic dust collector, comprising:
the dust removal box body is provided with an air inlet and an air outlet, and the lower side wall of the dust removal box body is provided with a mounting opening;
the hopper opening of the ash hopper is upwards arranged on the lower side wall of the dust removal box body and is in sealing connection with the mounting opening;
the dust collection assembly comprises a conductive fiber belt electrode, a plurality of upper traction rollers and a plurality of lower traction rollers; the upper traction rollers are arranged in the inner cavity of the dust removal box body at intervals from front to back; the lower traction rollers are arranged in the inner cavity of the dust removal box body at intervals in the front-back direction and are positioned on the lower sides of the upper traction rollers; the conductive fiber band electrode is in transmission fit with the upper traction rollers and the lower traction rollers so that the conductive fiber band electrode wound on each upper traction roller forms an enclosure space with a downward opening at the front side and the rear side in the conveying direction, and the conductive fiber band electrode wound on each lower traction roller forms an enclosure space with an upward opening at the front side and the rear side in the conveying direction; at least one of the upper drawing rollers and the lower drawing rollers is a driving roller, and at least one of the lower drawing rollers extends downwards into the ash hopper;
the corona polar line is arranged in the enclosed space with the upward opening or the enclosed space with the downward opening and is insulated from the conductive fiber band electrode;
and the positive and negative polarity output ends of the power supply device are sequentially electrically connected with the conductive fiber band electrode and the corona polar line.
The beneficial effect who adopts above-mentioned scheme is: through dust absorption subassembly and the corona polar line as above setting up, the dirty gas by the dust removal box the air inlet gets into the back, at first through the line board formula electric field of constituteing by corona polar line and conductive fiber charged electrode, corona polar line produces the dust charge negative charge in the corona discharge messenger dirty air current, and electrified dust moves to conductive fiber cloth electrode under the effect of electric field force to subside on conductive fiber charged electrode. The dust settled on the conductive fiber belt electrode is stuck by water to become slurry, and along with the movement of the conductive fiber belt electrode, the lower traction roller arranged on the ash bucket is stretched into and is cleaned by the water in the ash bucket, and meanwhile, the surface of the conductive fiber belt electrode is uniformly stained with a water film, so that the continuous and high-efficiency dust removal is facilitated, and the dust removal efficiency is improved.
On the basis of the technical scheme, the invention can be further improved as follows:
the wet electrostatic dust collector further comprises an air inlet box and an air outlet box, the air outlet end of the air inlet box is communicated with the air inlet, and the air inlet end of the air outlet box is communicated with the air outlet.
The beneficial effect of adopting the further scheme is that:
the air inlet box and the air outlet box are arranged to reduce the noise of air entering and exiting the dust removal box body, and reduce the noise pollution of the device.
On the basis of the technical scheme, the invention can be further improved as follows:
the air inlet box and the air outlet box are respectively provided with an air flow uniform distribution plate at the joint of the dust removal box body, and the air flow uniform distribution plate comprises a plate body and uniform distribution holes formed in the plate body.
The beneficial effect of adopting the further scheme is that: gas passes through behind the air current equipartition board can distribute comparatively evenly in the dust removal box for flow through dusty gas in the dust removal box can be sufficient with the contact of conductive fiber band electrode, and then has improved the dust collection efficiency of this device.
On the basis of the technical scheme, the invention can be further improved as follows:
go up the carry over pinch rolls and all be provided with the annular groove down on the carry over pinch rolls, conductive fiber belt electrode with down the carry over pinch rolls or go up carry over pinch rolls complex one side edge the length direction of conductive fiber belt electrode is equipped with protruding muscle, protruding muscle be used for with the annular groove cooperation is in with right conductive fiber belt electrode go up the carry over pinch rolls or the axial of carry over pinch rolls down is spacing.
The beneficial effect of adopting the further scheme is that:
protruding muscle on the conductive fiber belt electrode with go up the carry over pinch rolls or the cooperation setting of carry over pinch rolls down makes conductive fiber belt electrode with go up the carry over pinch rolls or can be right when the belt drive cooperation of carry over pinch rolls down conductive fiber belt electrode is in go up the carry over pinch rolls or carry out spacingly down the axial of carry over pinch rolls, reduced the possibility that conductive fiber belt electrode takes place to take off the roller accident, and then improved this dust collector's security.
On the basis of the technical scheme, the invention can be further improved as follows:
the corona polar line comprises at least one of a circular line, a star-shaped line, a zigzag line and an angle steel barbed line.
The beneficial effect of adopting the further scheme is that: the corona electrode wire is selected from one of the upper corona electrode wires, so that the corona electrode wire is convenient to select and can be configured according to economic and practical requirements.
On the basis of the technical scheme, the invention can be further improved as follows:
the distance between the corona polar line and the conductive fiber band electrode is 100-500 mm.
The beneficial effect of adopting the further scheme is that:
corona polar line as above apart from setting up, both avoided corona polar line distance the too near number of times that leads to discharging of distance of the electrified utmost point of conductive fiber is too much, has avoided again corona polar line distance the too far distance of the electrified utmost point of conductive fiber leads to the number of times that discharges too little, leads to the not good dust removal of effect of discharging insufficient, has ensured the efficiency of removing dust when having saved the electric energy.
On the basis of the technical scheme, the invention can be further improved as follows:
the inner side of the ash bucket is provided with a mud scraping plate at a position corresponding to a lower traction roller which extends into the ash bucket downwards, and the mud scraping plate is attached to the conductive fiber belt electrode.
The beneficial effect of adopting the further scheme is that:
the setting of the mud scraper makes the conductive fiber belt electrode can scrape the muddy water which is not washed away after passing through the water containing ash bucket, and at the same time, the water film on the conductive fiber belt electrode is uniformly scraped, so that the contact area between the water film on the conductive fiber belt electrode and the dust-containing gas is increased, and the dust removal efficiency of the dust removal device is further increased.
On the basis of the technical scheme, the invention can be further improved as follows:
the included angle between the mud scraping plate and the width direction of the conductive fiber band electrode is 15 degrees.
The beneficial effect of adopting the further scheme is that:
the mud scraper with the contained angle setting of the electrified electrode width direction of conductive fiber makes quilt the muddy water that the mud scraper scraped is concentrated and is followed one side of ash bucket falls into, and it is right to have avoided the muddy water of scraping upper water quality causes excessive pollution in the ash bucket, and then guaranteed by the electrified electrode of conductive fiber follows the water film that the ash bucket was stained with is comparatively clean, and then can continue to absorb the flow through high-efficiently the dirty gas of dust removal box, and then has improved the dust collection efficiency of this device.
On the basis of the technical scheme, the invention can be further improved as follows:
the conducting fiber band electrode is in go up the carry over pinch rolls or the interval is provided with the multiunit in the axial of carry over pinch rolls down, corona polar line with conducting fiber band electrode corresponds and is provided with the multiunit.
Adopt above-mentioned further scheme's beneficial effect be, conductive fiber area and the multiunit setting of corona polar line can be dismantled and repaired by branch position, even partly bad, can also guarantee another part and continue work after tearing down, has improved the live time of equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of a wet electrostatic precipitator with a front side plate of a precipitator casing hidden therein according to an embodiment of the present invention;
FIG. 2 is a perspective view of the dust extraction case of FIG. 1;
FIG. 3 is a schematic view of the upper and lower pull rolls and conductive fiber band electrode mounting locations of FIG. 1;
FIG. 4 is a schematic illustration of the mating of the upper and lower pull rolls and the conductive fiber band of FIG. 1;
FIG. 5 is a schematic view showing the positional relationship between the lower pulling roll and the scraper bar of FIG. 1;
fig. 6 is a schematic view of the connection of the conductive fibrous band electrode and the corona wire of fig. 1 to a power supply device.
Reference numerals:
reference numerals Name (R) Reference numerals Name (R)
1 Dust removal box 11 Air inlet
12 Air outlet 13 Mounting port
14 Air flow uniform distribution plate 141 Plate body
142 Flow equalizing hole 2 Ash bucket
21 Bucket mouth 22 Mud scraper
31 Conductive fiber band electrode 311 Convex rib
32 Upper traction roller 33 Lower traction roller
34 Annular groove 4 Corona electrode wire
5 Power supply device 6 Air inlet box
7 Air outlet box
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In order to solve the problem of low dust removal efficiency caused by insufficient cleaning of the dust collecting electrode of the wet electrostatic dust removal device after dust collection, referring to fig. 1 to 6, an embodiment of the present invention provides a wet electrostatic dust removal device, including: the dust removal device comprises a dust removal box body 1, an ash bucket 2, a dust collection assembly, a corona polar wire 4 and a power supply device 5. The dust removing box body 1 is provided with an air inlet 11 and an air outlet 12, and the lower side wall of the dust removing box body 1 is provided with a mounting port 13, it should be noted that in this embodiment, the air inlet 11 and the air outlet 12 are arranged at two horizontally opposite sides of the dust removing box body 1, and the shapes of the air outlet 12 and the air inlet 11 are not limited to the square, the round or other shapes shown in the drawings; the hopper opening 21 of the ash hopper 2 is upwards arranged on the lower side wall of the dust removal box body 1, and the hopper opening 21 is hermetically connected with the installation opening 13, namely the hopper opening 21 of the ash hopper 2 is connected with the installation opening 13 through a sealing element or sealant after being inosculated; the dust suction assembly comprises a conductive fiber belt electrode 31, a plurality of upper drawing rollers 32 and a plurality of lower drawing rollers 33, wherein the conductive fiber belt electrode 31 is a roller belt made of conductive fibers, and the number of the plurality of upper drawing rollers 32 and the plurality of lower drawing rollers 33 can be four as that of the upper drawing rollers 32 and five as that of the lower drawing rollers 33 shown in FIG. 4, or can be set as required; the upper drawing rollers 32 are arranged in the inner cavity of the dust removing box body 1 at intervals along the front and back directions; the lower drawing rollers 33 are arranged in the inner cavity of the dust removing box body 1 at intervals in the front-back direction and are positioned at the lower sides of the upper drawing rollers 32; the conductive fiber belt electrode 31 is in driving fit with the plurality of upper pulling rolls 32 and the plurality of lower pulling rolls 33 so that each of the plurality of upper pulling rolls 32 forms a closed space with an opening facing downward around the conductive fiber belt electrode 31 at the front and rear sides of the conveying direction, that is, the conductive fiber belt electrode 31 is wound upward from one lower pulling roll 33, passes through one upper pulling roll 32, and then is wound downward to the lower pulling roll 33 adjacent to the previous lower pulling roll 33, the conductive fiber belt electrode 31 between the two lower pulling rolls 33 and the one upper pulling roll 32 forms a U-shaped closed space with an opening facing downward, and the conductive fiber belt electrode 31 wound around each of the plurality of lower pulling rolls 33 forms a closed space with an opening facing upward at the front and rear sides of the conveying direction, that is, the conductive fiber belt electrode 31 is wound downward from one upper pulling roll 32, passes through one lower pulling roll 33, and then is wound upward to the previous one lower pulling roll 33 After the upper drawing roll 32 adjacent to the upper drawing roll 32, the conductive fiber band electrode 31 between the two upper drawing rolls 32 and the lower drawing roll 33 is enclosed into a U-shaped enclosed space with an upward opening; at least one of the upper drawing rolls 32 and the lower drawing rolls 33 is a driving roll, and the driving roll is a rotation driving device arranged on the upper drawing roll 32 or the lower drawing roll 33, and the rotation driving device can be a motor or formed by combining a motor and a moving mechanism, such as the matching of the motor and a transmission belt. At least one of the lower drawing rollers 33 extends downwards into the ash bucket 2, namely, the part of the conductive fiber band electrode 31, which is in transmission fit with the lower drawing roller 33 belt extending into the ash bucket 2, can be immersed into the water in the ash bucket after the ash bucket 2 contains water; the corona polar line 4 is arranged in the enclosed space with the upward opening or the enclosed space with the downward opening, and is insulated from the conductive fiber strip electrode 31, namely, the corona polar line 4 is arranged in the enclosed space with the upward opening or the enclosed space with the downward opening after being installed, and the corona polar line 4 can be fixed on the side wall of the dedusting box body 1 through an insulating support; as shown in fig. 6, the positive and negative polarity outputs of the power supply device 5 are sequentially electrically connected to the conductive fiber strip electrode 31 and the corona electrode wire 4, that is, the conductive fiber strip electrode 31 is connected to the positive electrode of the power supply device 5, the corona electrode wire 4 is connected to the negative electrode of the power supply device, and the power supply device 5 may include a voltage boosting circuit or the like.
Through dust absorption subassembly and the corona polar line 4 as set up in this embodiment, dirty gas by dust removal box 1 the air inlet 11 gets into the back, at first through the line board formula electric field of constituteing by corona polar line 4 and conductive fiber band electrode 31, corona polar line 4 produces corona discharge and makes the dust in the dirty air current charge up the negative charge, and electrified dust moves to conductive fiber band electrode 31 under the effect of electric field force to subside on conductive fiber band electrode 31. The dust settled on the conductive fiber belt electrode 31 is stuck by water to become slurry, and along with the movement of the conductive fiber belt electrode 31, the lower traction roller 33 arranged on the ash bucket 2 is cleaned by the water in the ash bucket 2, and simultaneously, the surface of the conductive fiber belt electrode 31 is uniformly stained with a water film, thereby being convenient for continuing to remove dust with high efficiency and improving the dust removal efficiency.
In the embodiment of the present invention, as shown in fig. 1 and fig. 2, the wet electrostatic precipitator further includes an air inlet box 6 and an air outlet box 7, an air outlet end of the air inlet box 6 is communicated with the air inlet 11, that is, an air outlet end of the air inlet box 6 is connected with the air inlet 11 through a sealing structure, and an air inlet end of the air outlet box 7 is communicated with the air outlet 12, that is, an air inlet end of the air outlet box 7 is connected with the air outlet 12 through a sealing structure. The air inlet box 6 and the air outlet box 7 are arranged to reduce the noise of air entering and exiting the dust removal box body 1, and reduce the noise pollution of the device.
In order to increase the contact between the dust-containing gas and the conductive fiber band electrode 31, in this embodiment, as shown in fig. 1 and fig. 2, the gas inlet box 6 and the connection between the gas outlet box 7 and the dust removing box 1 are respectively provided with a gas flow distribution plate 14 at an interval, and the gas flow distribution plate 14 includes a plate body 141 and a gas flow distribution hole 142 uniformly distributed on the plate body 141. Gas via behind the gas flow uniform distribution board 14 can distribute comparatively evenly in the dust removal box 1 for flow through dirty gas in the dust removal box 1 can be abundant and the electrified electrode 31 contact of conductive fiber, and then has improved the dust collection efficiency of this device.
Referring to fig. 1, 3 and 4, in the embodiment of the present invention, each of the upper pulling roll 32 and the lower pulling roll 33 is provided with an annular groove 34, one side of the conductive fiber strip electrode 31, which is matched with the lower pulling roll 33 or the upper pulling roll 32, is provided with a convex rib 311 along a length direction of the conductive fiber strip electrode 31, the length direction of the conductive fiber strip electrode 31 is a transmission direction of the conductive fiber strip electrode 31, and the convex rib 311 is used for matching with the annular groove 34 to limit the axial direction of the conductive fiber strip electrode 31 on the upper pulling roll 32 or the lower pulling roll 33. Protruding muscle 311 on the conducting fiber belt electrode 31 with go up carry over pinch rolls 32 or the cooperation setting of carry over pinch rolls 33 down makes conducting fiber belt electrode 31 with go up carry over pinch rolls 32 or can be right when the belt transmission cooperation of carry over pinch rolls 33 down the conducting fiber belt electrode 31 is in go up carry over pinch rolls 32 or carry out spacingly down carry over in the axial of carry over pinch rolls 33, reduced conducting fiber belt electrode 31 takes place to take off the possibility of roller accident, and then improved this dust collector's security.
In the implementation of the invention, the corona polar line 4 comprises at least one of a circular line, a star-shaped line, a zigzag line and an angle iron barbed line. It should be noted that the circular line, the star-shaped line, the zigzag line and the angle iron barbed line are all 4 types of corona polar lines available in the market. The corona polar line 4 is selected as one of the upper corona polar lines 4, so that the corona polar line 4 can be conveniently selected and configured according to economical efficiency and actual requirements.
Referring to fig. 1 and 3, the corona wire 4 is spaced from the conductive fiber band electrode 31 by a distance of 100 to 500 mm. Corona polar line 4 as above apart from setting up, both avoided corona polar line 4 distance the too near number of times that leads to discharging of distance of the electrified utmost point 31 of conductive fiber is too many, has avoided again corona polar line 4 distance the too far distance of the electrified utmost point 31 of conductive fiber leads to the number of times that discharges too little, leads to the effect of discharging not well to remove dust inadequately, has ensured the efficiency of removing dust when having saved the electric energy.
In the embodiment of the present invention, as shown in fig. 1, 3 and 5, a scraper 22 is disposed inside the ash bucket 2 at a position corresponding to a lower pulling roll 33 extending downward into the ash bucket 2, and the scraper 22 is disposed adjacent to the conductive fiber band electrode 31. The setting of the scraper 22 makes the conductive fiber belt can scrape the muddy water which is not washed away after passing through the water containing ash bucket 2, and at the same time, the water film on the conductive fiber belt electrode 31 is scraped evenly, so that the contact area between the water film on the conductive fiber belt electrode 31 and the dust-containing gas is increased, and the dust removal efficiency of the dust removal device is further increased.
In an embodiment of the present invention, referring to fig. 1, fig. 3 and fig. 5, the angle between the scraper 22 and the width direction of the conductive fiber band electrode 31 is α, and α is preferably 15 °. It should be noted that the width direction of the conductive fiber band electrode 31, i.e. the direction in which the conductive fiber band electrode 31 is parallel to the axial direction of the upper pulling roll 32 or the lower pulling roll 33, i.e. the direction in which the band surface of the conductive fiber band electrode 31 is perpendicular to the transmission direction of the conductive fiber band electrode 31, and the included angle between the mud scraping plate 22 and the width direction of the conductive fiber band electrode 31 is set to make the mud water scraped by the mud scraping plate 22 fall into the dust hopper 2 from one side of the dust hopper 2, so that excessive pollution of the scraped mud water to the upper water in the dust hopper 2 is avoided, and it is ensured that the water film from the dust hopper 2 by the conductive fiber band electrode 31 is relatively clean, and then the dust-containing gas flowing through the dust-removing box 1 can be continuously and efficiently absorbed, and the dust-removing efficiency of the device is improved.
In the embodiment of the present invention, as shown in fig. 1, the conductive fiber band electrode 31 is provided in plural sets at intervals in the axial direction of the upper drawing roll 32 or the lower drawing roll 33, and the corona wire 4 is provided in plural sets corresponding to the conductive fiber band electrode 31. The electrified electrode 31 of conducting fiber and the multiunit setting of corona polar line 4 can be dismantled and repaired by branch position, even partly bad, can also guarantee another part after pulling down and continue work, has improved the live time of equipment.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A wet electrostatic precipitator, comprising:
the dust removal box body (1) is provided with an air inlet (11) and an air outlet (12), and the lower side wall of the dust removal box body (1) is provided with a mounting opening (13);
the ash bucket (2), a bucket opening (21) of the ash bucket (2) is upwards installed on the lower side wall of the dust removal box body (1), and the bucket opening (21) is in sealing connection with the installation opening (13);
a dust suction assembly including a conductive fiber band electrode (31), a plurality of upper drawing rollers (32) and a plurality of lower drawing rollers (33); the upper drawing rollers (32) are arranged in the inner cavity of the dust removal box body (1) at intervals in the front-back direction; the lower drawing rollers (33) are arranged in the inner cavity of the dust removal box body (1) at intervals in the front-back direction and are positioned on the lower sides of the upper drawing rollers (32); the conductive fiber band electrode (31) is in belt transmission fit with the upper drawing rollers (32) and the lower drawing rollers (33) so that the conductive fiber band electrode (31) wound around each upper drawing roller (32) forms an enclosed space with a downward opening at the front side and the rear side of the conveying direction, and the conductive fiber band electrode (31) wound around each lower drawing roller (33) forms an enclosed space with an upward opening at the front side and the rear side of the conveying direction; wherein at least one of the upper drawing rollers (32) and the lower drawing rollers (33) is a driving roller, and at least one of the lower drawing rollers (33) extends downwards into the ash hopper (2);
the corona polar line (4) is arranged in the enclosed space with the upward opening or the enclosed space with the downward opening and is insulated from the conductive fiber band electrode (31);
the positive and negative output ends of the power supply device (5) are electrically connected with the conductive fiber band electrode (31) and the corona polar line (4) in sequence;
a mud scraping plate (22) is arranged at the corresponding position of a lower traction roller (33) which extends into the ash bucket (2) downwards on the inner side of the ash bucket (2), and the mud scraping plate (22) is attached to the conductive fiber band electrode (31);
the included angle between the mud scraping plate (22) and the width direction of the conductive fiber band electrode (31) is 15 degrees.
2. A wet electrostatic precipitator according to claim 1, further comprising an inlet box (6) and an outlet box (7), wherein the outlet end of the inlet box (6) is communicated with the inlet (11), and the inlet end of the outlet box (7) is communicated with the outlet (12).
3. The wet electrostatic precipitator according to claim 2, wherein the air inlet box (6) and the connection between the air outlet box (7) and the precipitator body (1) are provided with an air distribution plate (14) at intervals, the air distribution plate (14) comprises a plate body (141), and the plate body (141) is provided with an air distribution hole (142).
4. The wet electrostatic precipitator of claim 1, wherein the upper pulling roll (32) and the lower pulling roll (33) are both provided with an annular groove (34), one side of the conductive fiber strip electrode (31) matched with the lower pulling roll (33) or the upper pulling roll (32) is provided with a convex rib (311) along the length direction of the conductive fiber strip electrode (31), and the convex rib (311) is used for being matched with the annular groove (34) to limit the axial direction of the conductive fiber strip electrode (31) on the upper pulling roll (32) or the lower pulling roll (33).
5. A wet electrostatic precipitator as claimed in claim 1, wherein the corona pole wires (4) comprise at least one of circular wires, star wires, saw tooth wires and angle iron barbed wires.
6. A wet electrostatic precipitator as claimed in claim 1, wherein the corona wire (4) is at a distance of 100 to 500mm from the conductive fibrous band electrode (31).
7. A wet electrostatic precipitator as claimed in claim 1, wherein the conductive fiber band electrode (31) is provided with a plurality of groups at intervals in an axial direction of the upper pulling roll (32) or the lower pulling roll (33), and the corona electrode line (4) is provided with a plurality of groups corresponding to the conductive fiber band electrode (31).
CN201910436404.8A 2019-05-23 2019-05-23 Wet electrostatic dust collector Expired - Fee Related CN110252511B (en)

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CN114887768A (en) * 2022-03-31 2022-08-12 高邮市环创资源再生科技有限公司 Wet electrostatic dust collector for waste gas treatment

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