JP2938435B1 - Cleaning device and cleaning method for dust collecting electrode - Google Patents

Abstract

An object of the present invention is to provide a cleaning method capable of cleaning a dust collecting electrode cleanly. A cleaning method for cleaning the surface of a dust collecting electrode (16). A first cleaning step of spraying a foamy cleaning solution with a detergent, water and air toward the surface of the dust collecting electrode 16;
6, a wiping step for removing the foamy cleaning liquid remaining on the surface of the second electrode, a second cleaning step of spraying atomized water with water and air toward the surface of the dust collecting electrode 16 after the wiping step, After the washing step 2, a drying step for injecting air toward the surface of the dust collecting electrode 16 is included. Further, a cleaning apparatus for performing such a cleaning method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device and a cleaning method for removing dust accumulated on the surface of a dust collecting electrode.

[0002]

2. Description of the Related Art Conventionally, in the construction of tunnels and the like, an electric dust collector has been used to remove dust contained in the air and clean the air. This electric dust collector generally includes a charging unit for charging dust in the air to a predetermined electrode, and a dust collecting unit for collecting dust charged in the charging unit. A charging electrode is provided in the charging unit, and the charging electrode generates, for example, a positive (or negative) DC corona discharge discharge to positively (or negatively) charge dust in the air. A plurality of dust collecting electrodes are provided at predetermined intervals in the dust collecting portion, and a negative (or positive) DC voltage is applied to a part of these dust collecting electrodes, and a positive (or negative) voltage is applied to the rest of them. A DC voltage is applied or electrically grounded. Therefore, when the positively (or negatively) charged dust flows to the dust collection portion, the positively (or negatively) charged dust is electrostatically applied to the dust collection electrode to which a negative (or positive) DC voltage is applied. Adhering, dust in the air is deposited on the dust collecting electrode.

In this type of electrostatic precipitator, when the amount of dust accumulated on the precipitating electrode increases, the electric charge due to the voltage applied to the precipitating electrode does not sufficiently act on the charged dust, and the dust collecting efficiency is reduced. Decrease. Further, dust adhering to the dust collecting electrode causes a phenomenon of reverse ionization and re-dispersion, and the dust collecting effect is reduced due to this phenomenon.

[0004] Therefore, in such an electric precipitator, the precipitating electrodes are periodically cleaned to remove dust deposited on their surfaces. As a method of cleaning the dust collecting electrode, for example, a method of blowing pressurized air to the dust collecting electrode to blow off dust on its surface (Japanese Patent Publication No. 57-16864), and blowing pressurized water onto the surface of the dust collecting electrode And a method of cleaning the surface with water (Japanese Patent Laid-Open No. 63-248460).

[0005]

However, in the method of blowing pressurized air, when dust to be collected contains an adhesive component, the effect of removing dust is low by simply blowing the pressurized air. In addition, there is a problem that dust accumulated on the surface of the dust collecting electrode cannot be sufficiently removed.

Further, in the method of spraying pressurized water, pressurized water must be sprayed over substantially the entire area of the dust collecting electrode in order to wash out dust with the spray pressure of water. There is a problem that the arrangement and structure of the nozzles become complicated. Also, dust removed by pressurized water,
There is also a problem that the dust is scattered around and adheres to an adjacent dust collecting electrode or other constituent members, and the cleaning efficiency is poor. further,
There is also a problem that water must be transported and secured at a site without a water source, and its use is limited.

[0007] In order to solve the disadvantages of the conventional cleaning method, for example, one disclosed in Japanese Patent Application Laid-Open No. 7-80352 is known. With this improved cleaning method,
First, a foamy cleaning liquid with a detergent, water and air is sprayed on the surface of the dust collecting electrode, and then atomized water with water and air is sprayed, and then air is sprayed. In this method, the dust accumulated on the dust collecting electrode is fluidized by injecting the foamy cleaning liquid, and thereafter, the foamy cleaning liquid remaining on the dust collecting electrode is removed by injecting the atomized water. By spraying air, water droplets remaining on the dust collecting electrode are removed, and thus dust accumulated on the surface of the dust collecting electrode is washed and removed as required.

In this improved cleaning method, the foamed cleaning liquid is jetted to the upper end of the dust collecting electrode, and the jetted cleaning liquid flows down along the surface of the dust collecting electrode by its own weight. However, at the time of this removal, there is a problem that the foamy cleaning liquid slightly remains at the lower end of the dust collecting electrode, and it is not possible to clean the lower end in particular.

An object of the present invention is to provide a cleaning apparatus and a cleaning method capable of cleaning a dust collecting electrode cleanly.

[0010]

According to the present invention, there is provided a cleaning apparatus for cleaning the surface of a dust collecting electrode, wherein the foaming cleaning liquid is sprayed with detergent, water and air toward the surface of the collecting electrode. A first injecting unit, a second injecting unit for injecting atomized water by water and air toward the surface of the dust collecting electrode, and a second injecting unit for injecting air toward the surface of the dust collecting electrode A third spraying means, and a wiper means for wiping the surface of the dust collecting electrode, wherein the wiper means comprises:
An apparatus for cleaning a dust collecting electrode, characterized in that a surface of the dust collecting electrode is wiped off to remove a residual foamy cleaning liquid after the foaming cleaning liquid is sprayed by the first spraying means.

According to the present invention, wiper means are provided in addition to the first to third spraying means, and the wiper means wipes the surface of the dust collecting electrode after spraying the foamy cleaning liquid. The remaining foamy cleaning liquid is reliably removed by the wiper means. Therefore, the foaming cleaning liquid is removed at the time of the later injection of the atomized water and the air, so that the surface of the dust collecting electrode can be finished and cleaned by the injection of the atomized water, and also by the injection of the air. The remaining water droplets can be removed, and the surface of the dust collecting electrode can be cleaned as required.

Further, the present invention is characterized in that the cleaning liquid contains a viscous liquid for forming a viscous liquid film on the surface of the dust collecting electrode.

According to the present invention, since the viscous liquid is contained in the cleaning liquid, a viscous liquid film is formed on the surface of the dust collecting electrode by spraying the cleaning liquid. If low-resistance dust is contained in the air, such dust is difficult to collect on the surface of the dust collection electrode due to charging, and even if collected, there is a risk of re-scattering. By forming a liquid film, dust (including low resistance) in the air is adsorbed by the viscous liquid film, and thus, re-scattering of collected dust is prevented.

According to the present invention, there is provided a cleaning apparatus for cleaning the surface of a dust collecting electrode, wherein a first spraying means for spraying a foamy cleaning liquid with a detergent, water and air toward the surface of the dust collecting electrode. A second jetting unit for jetting atomized water by water and air toward the surface of the dust collecting electrode; and a third jetting unit for jetting air toward the surface of the dust collecting electrode. Wherein the cleaning liquid includes a viscous liquid for forming a viscous liquid film for collecting dust on the surface of the precipitating electrode after cleaning.

According to the present invention, since the viscous liquid is contained in the cleaning liquid, the viscous liquid film is formed on the surface of the dust collecting electrode by spraying the cleaning liquid. Therefore, the viscous liquid film can be formed by using the cleaning operation performed periodically. In addition, by forming the viscous liquid film in this manner, dust (including low-resistance) in the air is adsorbed by the viscous liquid film, preventing dust from re-scattering and improving dust collection efficiency. it can.

The present invention also relates to a method for cleaning a dust collecting electrode, which comprises spraying a cleaning liquid with a detergent and water toward the surface of the collecting electrode, wherein the cleaning liquid comprises a viscous liquid film for collecting dust on the surface of the collecting electrode. A method for cleaning a dust collecting electrode, comprising a viscous liquid to be formed after cleaning.

According to the present invention, since the cleaning liquid contains the viscous liquid, a viscous liquid film is formed on the surface of the dust collecting electrode by using the cleaning operation with the cleaning liquid, and the dust in the air is removed in the same manner as described above. By adsorbing, dust collection efficiency can be increased.

Further, the present invention provides a cleaning method for cleaning a surface of a dust collecting electrode, wherein a first cleaning step of spraying a foamy cleaning liquid with a detergent, water and air toward the surface of the dust collecting electrode, After the first cleaning step, a wiping step of removing foamy cleaning liquid remaining on the surface of the dust collecting electrode by a wiper means; and after the wiping step, water and water are directed toward the surface of the dust collecting electrode. A second cleaning step of injecting atomized water with air, and a drying step after the second cleaning step of injecting air toward the surface of the dust collecting electrode. This is a method for cleaning dust electrodes.

According to the present invention, after the first cleaning step, a wiping step of removing the remaining foamy cleaning liquid by the wiper means is performed. Therefore, in this wiping step, the foamy cleaning liquid remaining on the surface of the dust collecting electrode can be reliably removed by the wiper means. Therefore, the foaming cleaning liquid is removed at the time of the later injection of the atomized water and the air, so that the surface of the dust collecting electrode can be finished and cleaned by the injection of the atomized water, and also by the injection of the air. The remaining water droplets can be removed,
Thus, the surface of the dust collecting electrode can be cleaned as required.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway side view showing an example of an electric dust collector provided with an embodiment of a dust collecting electrode cleaning apparatus according to the present invention, and FIG. 2 shows the electric dust collector of FIG. FIG. 3 is a partially cutaway plan view, and FIG. 3 is an explanatory diagram schematically showing a supply system for supplying detergent, air, and water in the cleaning device.

Referring to FIGS. 1 and 2, the illustrated electrostatic precipitator 2 includes a charging unit 6 disposed on the upstream side in the air flow direction indicated by arrow 4 and a charging unit in the direction indicated by arrow 4. 6
And a dust collecting unit 8 disposed downstream of the dust collecting unit. Four charging units 6 are spaced vertically in the vertical direction (vertical direction in FIG. 1; direction perpendicular to the paper in FIG. 2), and laterally (direction perpendicular to the paper in FIG. 1, vertical in FIG. 2). Are provided with two charging units 10 at an interval. Each charging unit 10 is provided with a plurality of charging electrodes 12 spaced apart in the horizontal direction.
Is composed of, for example, a wire-like electrode. The dust collecting unit 8 is provided with a dust collecting unit 14 corresponding to each charging unit 10 of the charging unit 6. That is,
The dust collection unit 10 is provided with four dust collection units 14 spaced vertically and two dust collection units 14 spaced horizontally. Each dust collecting unit 10 is provided with dust collecting electrodes 16 at intervals in the horizontal direction corresponding to each charging electrode 12, and each dust collecting electrode 16 is formed of a plate-like electrode. In the electrostatic precipitator 2, when viewed in the direction indicated by the arrow 4, a front damper door 18 is provided on an upstream side of the apparatus 2, and a rear damper door 20 is provided on a downstream side thereof. .

In the electrostatic precipitator 2, for example, a negative (or positive) DC voltage is applied to each charging electrode 12 of each charging unit 10. Then, for example, a negative (or positive) DC voltage having a polarity opposite to that of the charging electrode 12 is applied to a part of the dust collecting electrode 16 of each dust collecting unit 14, and a positive (or positive) voltage is applied to the rest thereof. Negative) DC voltage is applied or electrically grounded. Therefore, when air including dust such as tunnel dust flows through the charging unit 6, dust in the air is charged negatively (or positively) by negative (or positive) corona discharge of the charging electrode 12. And
When the negatively (or positively) charged dust flows in the dust collecting section 8 in the direction indicated by the arrow 4, it is electrostatically attracted to the dust collecting electrode 16 to which a positive DC voltage is applied, and the dust collecting electrode 16 is charged. Dust is collected as required. Note that an AC voltage can be applied to each of the charging electrodes 12 and each of the dust collecting electrodes 16 as required. In such a case, dust in the air is charged alternately positively and negatively. The negatively and positively applied dust is alternately applied, and the positively charged dust is electrostatically attracted to the negatively applied dust collecting electrode 16, and the negatively charged dust is applied to the positively applied dust collecting electrode 16. It is electrostatically attracted.

The electrostatic precipitator 2 is equipped with the following cleaning device. The illustrated cleaning device has a first
To the third injection mechanism 22, 24, 26. First
The ejection mechanism 22 is disposed between the front damper door 18 and the charging unit 6 corresponding to each charging unit 10 (FIG. 1).
And some of them are shown in FIG. 2). Each first injection mechanism 22 has a first pipe 28 extending in the lateral direction, and the first pipe 28 is provided with a plurality of first injection nozzles 30 spaced apart in the axial direction. . The first spray nozzle 30 sprays a cleaning liquid or the like toward the charging unit 6 and the dust collecting unit 8 in the direction indicated by the arrow 4. The second ejection mechanism 24 is disposed between the dust collection unit 8 and the rear damper door 20 corresponding to each dust collection unit 14. Each second injection mechanism 24 includes a second pipe 30 extending in the lateral direction, and the second pipe 30 is provided with a plurality of second injection nozzles 32 spaced apart in the axial direction. . Further, the third ejection mechanism 26 is disposed between the dust collection unit 8 and the rear damper door 20 corresponding to each dust collection unit 14, similarly to the second ejection mechanism 24. Each third injection mechanism 2
6 includes a third pipe 34 disposed below the second pipe 30 of the second injection mechanism 24, and the third pipe 34 has a plurality of axially spaced apart pipes. A third injection nozzle 36 is provided. The second and third spray nozzles 30 and 34 spray the cleaning liquid or the like toward the dust collecting unit 8 in a direction opposite to the direction indicated by the arrow 4. In this embodiment, the ejection force of the ejection flow from the second ejection nozzle 30 is the third ejection force.
The injection pressure is set to be higher than the injection pressure of the injection flow from the injection nozzle 36.

The first to third pipes 28, 30, 34 of the first to third injection mechanisms 22, 24, 26 are arranged above the corresponding dust collection electrodes 16 of the corresponding dust collection unit 14. The jet flow from the third jet nozzles 30, 32, 36 is jetted toward the upper part of the corresponding dust collecting substrate 16.

In the vicinity of the side of the dust collecting electrode 16 of each dust collecting unit 14, an insulator washing nozzle 38 for washing a supporting insulator, a power feeding insulator and the like is disposed. The cleaning pipe 40 is provided. These insulator cleaning nozzles 38 spray a cleaning liquid or the like toward the corresponding support insulator, power supply insulator, or the like.

In this embodiment, the first to third injection nozzles 30, 32, 32 of the first to third injection mechanisms 22, 24, 26
36 is constituted by, for example, a flat spray nozzle, and the ejection angles of the first to third ejection nozzles 30, 32, 36 are set as follows, for example. That is, the first
In the injection nozzle 22, the corresponding charging unit 10
The spray angle is set so that the cleaning liquid or the like is sprayed toward the upstream side (the upstream side when viewed in the air flow direction indicated by arrow 4) of the charging electrode 12 and the corresponding dust collecting electrode 16 of the dust collecting unit 14. Is done. In the second spray nozzle 32, the cleaning liquid or the like is sprayed toward the central portion (the central portion as viewed in the air flow direction indicated by the arrow 4) of the corresponding dust collecting electrode 16 of the dust collecting unit 14. Is set to the injection angle. Further, in the third spray nozzle 36, a cleaning liquid or the like is sprayed toward the downstream side of the dust collecting electrode 16 of the corresponding dust collecting unit 14 (downstream side as viewed in the air flow direction indicated by the arrow 4). The injection angle is set so as to perform.

Detergent, water and air are supplied to the first to third injection mechanisms 22, 24 and 26 by the supply system shown in FIG. Referring primarily to FIG. 3, the supply system shown includes a first line 42 for delivering detergent, a second line 44 for delivering air, and a second line 44 for delivering water. And a third injection mechanism 2.
Premix means 48 is provided in connection with 2, 24, 26. The first line 42 is connected to a detergent supply (not shown), and the detergent from the detergent supply is supplied to each premix means 48 via the first line 42. Further, the second line 44 is connected to an air supply source (not shown), and air from the air supply source is supplied to each premix means 48 via the second line 44. In addition, the third
The line 46 is connected to a water supply (not shown), and water from the water supply is supplied to each premix means 48.
When the detergent, air and water are supplied, each of the premixing means 48 mixes the detergent, air and water, and mixes them.
The foaming cleaning liquid is sprayed from the spray nozzles 24, 26, 32, and 36, and when air and water are supplied, they are mixed to spray mist water from the spray nozzles 30, 32, 36, and the air is discharged. When supplied, the injection nozzles 30, 32,
Air is injected from 36. As described above, in this embodiment, the first to third injection mechanisms 22, 24, 2
6 functions as a first spraying means for spraying the foamy cleaning liquid when the detergent, air and water are supplied to the premixing means 48, and atomizes when the air and water are supplied to the premixing means 48. It functions as second injection means for injecting water, and also functions as third injection means for injecting air when air is supplied to the premixing means 48. Instead of such a configuration, a first injection unit for injecting a foamy cleaning liquid, a second injection unit for injecting atomized water, and a third injection unit for injecting air The means can be provided separately and independently.

As shown in FIG. 2, wiper means 50 are provided corresponding to the dust collecting electrodes 16 of each dust collecting unit 14. When a negative (or positive) DC voltage is applied to the charging electrode 12 of each charging unit 10, each dust collection unit 14
In the above, dust is deposited on the dust collecting electrode 16 to which a positive (or negative) DC voltage is applied (the DC voltage is applied to every other one of the plurality of dust collecting electrodes 16), and accordingly, FIG. 5 is provided. 3 to 5, the illustrated wiper means 50 includes a rotating shaft 52 rotatably supported, and one end of a pair of revolving arms 54, 56 is fixed to the rotating shaft 52. One swivel arm 54 is disposed on one side (right side in FIG. 5) of the dust collecting electrode 16 where dust is collected.
A cleaning brush 58 is provided on a surface facing the dust collecting electrode 16. The other rotating arm 56 is disposed on the other side (left side in FIG. 5) of the dust collecting electrode 16 where dust is collected, and the cleaning brush 60 is also provided on the surface of the rotating arm 56 facing the dust collecting electrode 56. Is provided. The rotating shaft 52 is also drivingly connected to a drive source 62 such as an electric motor via a speed reduction mechanism (not shown). When the drive source 62 rotates forward and reverse, the turning arms 54 and 56 move to the positions shown in FIG. A first angular position shown by a solid line (a position retracted from the dust collecting electrode 16 and the turning arms 54 and 56 extend substantially upward) and a second angular position shown by a two-dot chain line in FIG. (A position rotated by approximately 90 degrees from the position in the direction indicated by the arrow 64, and extends substantially horizontally at the lower end of the dust collection electrode 16)
It is turned between. Thus, the swing arms 54, 56
Is rotated, the cleaning brush 58 of the revolving arm 54 acts on one surface of the dust collecting electrode 16, and the cleaning brush 60 of the other revolving arm 56 acts on the other surface of the dust collecting electrode 16.

On the other hand, when an AC voltage is applied to the charging electrode 12 of each charging unit 10, the AC voltage is also applied to each of the dust collecting electrodes 16 in each of the dust collecting units 14. Dust is deposited on the dust electrode 16, and therefore a wiper means 70 shown in FIG. 6 is provided. Referring to FIG. 6, the illustrated wiper means 70 includes a rotating shaft 72 rotatably supported, and the rotating arm 7
4 is fixed at one end. The revolving arm 74 is disposed between the pair of dust collecting electrodes 16 where dust is collected, and a cleaning brush 76 is provided on one side (the right side in FIG. 6) of
A cleaning brush 78 is provided on the other surface (the left surface in FIG. 6). The rotating shaft 72 is also connected to a driving source 80 via a speed reduction mechanism (not shown). When the driving source 80 rotates forward and reverse, as described above, the revolving arm 74 rotates the first arm. And the second angular position. When the swivel arm 74 rotates in this manner, one cleaning brush 76 of the swivel arm 74 acts on one surface of the adjacent dust collecting electrode 16, and the other cleaning brush 78 of the swivel arm 76 moves to the adjacent dust collecting electrode 16
On the other surface (the surface of one dust collecting electrode 16 facing the one surface).

As a detergent used in such a washing apparatus,
For example, a weakly alkaline detergent can be used, and an alkali aqueous solution (about pH 10) of an anionic surfactant can be conveniently used by mixing with water and air. Also, it is preferable to mix a suitable amount of a viscous liquid into the detergent, and silicone oil can be used as the viscous liquid. By mixing the viscous liquid into the detergent as described above, a viscous liquid film is formed on the surface of the dust collection electrode when the dust collection electrode is cleaned with the cleaning liquid. Therefore, the dust in the air is adsorbed to the viscous liquid film at the time of the subsequent dust collection operation, and the re-scattering of the adsorbed dust is prevented, whereby the dust collecting effect can be further enhanced.

The cleaning operation by the above-described cleaning device is as follows. First, a first cleaning step of spraying a foamy cleaning liquid is performed. In the first cleaning step,
Detergent, air, and water are supplied to the respective premixing means 48 through the third lines 42, 44, 46, and are mixed by the premixing means 48, and the mixed foamed cleaning liquid is subjected to the first to third injections. The first of the mechanisms 22, 24, 26
Injection is performed from the third injection nozzles 30, 32, and 36 toward the corresponding dust collection electrode 16 of the dust collection unit 14. Since the foamy cleaning liquid is sprayed onto the upper part of each dust collecting electrode 16, the sprayed foamy cleaning liquid flows downward along the surface of the dust collecting electrode 16, and flows downward to the surface of the dust collecting electrode 16. Is removed, and the surface of the dust collecting electrode 16 is thus cleaned with the foamed cleaning agent. At this time, since the detergent contains a viscous liquid, when the foamy cleaning liquid flows down along the surface of the dust collecting electrode 16, a viscous liquid film is formed on the surface of the dust collecting electrode 16 as required. A viscous liquid film can be formed without providing a dedicated process.

Next, a wiping step by the wiper means 50 is performed. In this wiping step, the drive source 62 is rotated forward and backward, and the turning arms 54 and 56 are turned from the first angle position to the second angle position in the direction indicated by the arrow 64, and thereafter the first angle position Turn to return to the original position. The swiveling of the swiveling arms 54, 56 in this manner causes the cleaning brushes 58,
60 acts on the surface of the dust collecting electrode 16 and the dust collecting unit 14
The cleaning liquid remaining on the surface of the dust collecting electrode 16 (particularly, tends to remain on the lower end of the dust collecting electrode 16)
8, 60 ensures that it is wiped off. In addition,
The swiveling arms 54 and 56 can be reciprocated about 3 to 5 times in order to more reliably wipe off the remaining cleaning liquid.

Next, a second cleaning step of spraying atomized water is finally performed to finish and clean the surface of the dust collecting electrode 16 after the wiping. In the second cleaning step, air and water are supplied to each premix means 48 through the second and third lines 44 and 46, and the premix means 4
At 8, these are mixed, and the mixed mist is collected from the first to third injection nozzles 30, 32, 36 of the first to third injection mechanisms 22, 24, 26 to the corresponding dust collection unit 14. Injected toward the dust electrode 16. The atomized water is also collected at each dust collecting electrode 16.
Is sprayed to the upper portion of the dust collecting electrode 16, and the sprayed mist flows downward along the surface of the dust collecting electrode 16, and together with the downward flow, the cleaning liquid and dust somewhat remaining on the surface of the dust collecting electrode 16 are removed. The dust collecting electrode 16 is surely removed, and the surface of the dust collecting electrode 16 is finally cleaned with the mist water.

Thereafter, the dust collecting electrode 1 of the dust collecting unit 14
A drying process for drying 6 is performed. In the drying step, air is supplied to each premix means 48 through the second line 44, and the air is supplied to the first to third injection mechanisms 22, 24, 26 via the premix means 48.
Injection is performed from the injection nozzles 30, 32, and 36 toward the corresponding dust collection electrode 16 of the dust collection unit 14. The air sprayed from the first to third spray nozzles 30, 32, 36 blows off water remaining on the surface of the dust collecting electrode 16, and thus the surface of the dust collecting electrode 16 is dried as required.

In this cleaning apparatus, as described above, the first
The cleaning step, the wiping step, the second cleaning step, and the drying step are performed in this order, so that dust accumulated on the dust collecting electrode 16 can be reliably removed by cleaning.

As described above, one embodiment and one embodiment of the cleaning apparatus and the cleaning method according to the present invention have been described. However, the present invention is not limited to these embodiments and examples, and departs from the scope of the present invention. Without various deformation,
Modifications are possible.

For example, in the illustrated embodiment, the cleaning brushes 58, 60 (76, 78) are provided on the revolving arms 54, 56 (74) of the wiper means 50 (70). A blade formed of rubber or synthetic rubber can be used, and the surface of the dust collecting electrode 16 can be similarly wiped as required using a blade.

[0038]

According to the cleaning device of the first aspect of the present invention,
Wiper means is provided in addition to the first to third injection means,
Since the wiper means wipes the surface of the dust collecting electrode after spraying the foamy cleaning liquid, the foamy cleaning liquid remaining on the surface of the dust collecting electrode is reliably removed by the wiper means. Therefore, the foaming cleaning liquid is removed at the time of the later injection of the atomized water and the air, so that the surface of the dust collecting electrode can be finished and cleaned by the injection of the atomized water, and also by the injection of the air. The remaining water droplets can be removed,
Thus, the surface of the dust collecting electrode can be cleaned as required.

According to the cleaning device of the second aspect of the present invention, since the cleaning liquid contains the viscous liquid, the viscous liquid film is formed on the surface of the dust collecting electrode by spraying the cleaning liquid. If low-resistance dust is contained in the air, such dust is difficult to collect on the surface of the dust collection electrode due to charging, and even if collected, there is a risk of re-scattering. By forming a liquid film, dust (including low resistance) in the air is adsorbed by the viscous liquid film,
Therefore, the re-scattering of the collected dust is prevented.

According to the cleaning device of the third aspect of the present invention, since the cleaning liquid contains the viscous liquid, a viscous liquid film is formed on the surface of the dust collecting electrode by spraying the cleaning liquid. Therefore, the viscous liquid film can be formed by using the cleaning operation performed periodically. In addition, by forming the viscous liquid film in this manner, dust (including low-resistance) in the air is adsorbed by the viscous liquid film, preventing dust from re-scattering and improving dust collection efficiency. it can.

According to the cleaning method of the fourth aspect of the present invention, since the cleaning liquid contains the viscous liquid, the viscous liquid film is formed on the surface of the dust collecting electrode by using the cleaning operation with the cleaning liquid. In the same manner as described above, dust in the air can be adsorbed to increase the dust collection efficiency.

Further, according to the cleaning method of the present invention, after the first cleaning step, a wiping step of removing the remaining foamy cleaning liquid by the wiper means is performed. Therefore, in this wiping step, the foamy cleaning liquid remaining on the surface of the dust collecting electrode can be reliably removed by the wiper means. Therefore, the foaming cleaning liquid is removed at the time of the later injection of the atomized water and the air, so that the surface of the dust collecting electrode can be finished and cleaned by the injection of the atomized water, and also by the injection of the air. The remaining water droplets can be removed, and the surface of the dust collecting electrode can be cleaned as required.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an example of an electric precipitator provided with an embodiment of a precipitator cleaning device according to the present invention.

FIG. 2 is a plan view showing the electric precipitator of FIG. 1 with a part cut away.

FIG. 3 is an explanatory diagram schematically showing a supply system for supplying detergent, air, and water in the cleaning device.

FIG. 4 is a front view schematically showing a wiper unit and a configuration related thereto in the cleaning apparatus.

5 is a side view schematically showing the wiper unit of FIG. 4 and a configuration related thereto.

FIG. 6 is a side view showing a modified wiper unit and a configuration related thereto.

[Explanation of symbols]

 2 Electric Dust Collector 6 Charging Unit 8 Dust Collection Unit 10 Charging Unit 12 Charging Electrode 14 Dust Collection Unit 16 Dust Collection Electrode 22 First Injection Mechanism 24 Second Injection Mechanism 26 Third Injection Mechanism 42 First Line 44 Second line 46 Third line 50 Wiper means 58, 60, 76, 78 Cleaning brush

Claims (5)

(57) [Claims] 1. A cleaning device for cleaning a surface of a dust collecting electrode, wherein: a first spraying unit for spraying a foamy cleaning liquid with a detergent, water and air toward a surface of the dust collecting electrode; A second jetting unit for jetting atomized water by water and air toward the surface of the dust collecting electrode; and a third jetting unit for jetting air toward the surface of the dust collecting electrode.
And a wiper means for wiping the surface of the dust collecting electrode, wherein the wiper means wipes the surface of the dust collecting electrode after spraying the foamed cleaning liquid by the first spraying means. A cleaning device for a dust collecting electrode, which removes a foamy cleaning liquid. 2. The cleaning apparatus for a dust collecting electrode according to claim 1, wherein the cleaning liquid contains a viscous liquid for forming a viscous liquid film on a surface of the dust collecting electrode. 3. A cleaning device for cleaning a surface of a dust collecting electrode, wherein: a first spraying unit for spraying a foamy cleaning liquid with a detergent, water and air toward a surface of the dust collecting electrode; A second jetting unit for jetting atomized water by water and air toward the surface of the dust collecting electrode; and a third jetting unit for jetting air toward the surface of the dust collecting electrode.
The cleaning liquid includes a viscous liquid for forming a viscous liquid film for collecting dust on the surface of the precipitating electrode after cleaning. 4. A method for cleaning a dust collecting electrode, comprising spraying a cleaning liquid with a detergent and water toward a surface of the collecting electrode, wherein the cleaning liquid forms a viscous liquid film for collecting dust on the surface of the collecting electrode after the cleaning. A method for cleaning a dust collecting electrode, comprising a viscous liquid for cleaning. 5. A cleaning method for cleaning a surface of a dust collecting electrode, wherein: a first cleaning step of spraying a foamy cleaning liquid with a detergent, water, and air toward the surface of the dust collecting electrode; After the cleaning step, a wiping step of removing a foamy cleaning liquid remaining on the surface of the dust collecting electrode by a wiper means; and after the wiping step, spraying water and air toward the surface of the dust collecting electrode. A second cleaning step of injecting water, and a water drop removing step of injecting air toward the surface of the dust collecting electrode after the second cleaning step. Cleaning method.