JPH07855A - Dust collector of electric dust collector - Google Patents

Abstract

(57) [Summary] [Construction] The conductive member E21 of the dust collecting side electrode plate E2 includes a downstream end E22. The downstream ends are electrode plates E1, E
When two layers are stacked, they extend longer than the application-side electrode plate E1 on the downstream side. [Effect] During installation work or maintenance
Even when a tool or the like faces the dust collecting portion E from the downstream side,
The downstream end portion E22 of the dust collecting side electrode plate E2 is prevented from contacting the application side electrode plate E1 with a tool or the like, whereby the application side electrode plate E1 can be reliably protected. Moreover,
Since it can be easily implemented only by changing the dimension setting of the dust collecting side electrode plate E2, it is possible to suppress an increase in manufacturing cost. In addition, the conductive member E21 causes the downstream end portion E2.
Since it is composed of 2, the dust collection area is widened accordingly,
The dust collection efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector of an electrostatic precipitator, and more particularly to a dust collector of an electrostatic precipitator for collecting dust previously charged on one electrode.

[0002]

2. Description of the Related Art Generally, an electrostatic precipitator of this type is provided with an ionization section arranged in a path of air to be cleaned and a dust collection section arranged downstream of the ionization section. The ionization unit charges the dust contained in the air to be cleaned to one polarity (for example, positive polarity) in advance and collects the charged dust by the dust collection unit.

The dust collecting section has an application side electrode plate and a dust collection side electrode plate. The two electrode plates are alternately laminated with an interval allowing air to flow therethrough, and are arranged downstream of the ionization section in the air path of the electrostatic precipitator. The application-side electrode plate is configured by covering a conductive member made of aluminum foil or the like with a covering member made of resin or the like in order to prevent arc discharge or the like. Further, the dust collecting electrode plate has a bare conductive member in order to release the charged electric charge. Then, a high voltage of, for example, about 2 KV is applied to the conductive member of the electrode plate on the application side to generate an electric field, and the dust ionized by the Coulomb force is collected by the electrode plate on the dust collection side.

[0004]

In the case of adopting the above-mentioned conventional dust collecting part, when the covering member covering the conductive member of the applying side electrode plate is damaged and the conductive member is exposed, insulation failure occurs, There was a problem that it caused arc discharge or short circuit. In many cases, the damage of the coating member is caused by the tool etc. coming into contact with the coating member of the application side electrode plate from the air discharge port side of the electrostatic precipitator when the dust collecting unit is attached or during maintenance, and the coating member is damaged. is happening.

Therefore, in order to eliminate such a problem, as shown in FIG. 3, the dust collecting portion E100 including the applying side electrode plate E101 and the dust collecting side electrode plate E102 in the air flow direction A is concerned. On the downstream side, a protection member 101 made of wire mesh or the like
It is conceivable to adopt a configuration in which the coating members are opposed to each other to prevent damage to the coating member of the application side electrode plate E101. However, in the configuration of FIG. 3, since it is necessary to attach the protective member 101 formed of a member different from the electrode plates E101 and E102, the number of parts increases and the number of assembling steps also increases, resulting in higher manufacturing cost. There was a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a dust collecting section of an inexpensive electrostatic precipitator capable of reliably protecting the electrode plate on the application side.

[0007]

In order to solve the above-mentioned problems, the dust collecting portion of the electrostatic precipitator of the present invention includes an electrically conductive member that is electrically connected to an electrode on the applying side and a coating member that covers the electrically conductive member. It has an electrode plate and a dust collecting side electrode plate that is electrically connected to the ground side electrode and includes a bare conductive member, and both electrode plates are alternately laminated at intervals allowing air to flow therethrough. In the air path of the electrostatic precipitator, a dust collecting part of the electrostatic precipitator disposed downstream of the ionization part, wherein the conductive member of the dust collecting side electrode plate is more than the applying side electrode plate during lamination. It is characterized in that it has a downstream end portion that extends to the downstream side.

The conductive member of the dust collecting side electrode plate is preferably a stainless plate.

[0009]

According to the dust collector of the electrostatic precipitator having the above structure, the conductive member of the electrode plate on the dust collecting side has the downstream end portion which extends longer on the downstream side than the electrode plate on the applying side when laminated. Even when a tool or the like faces the dust collecting part from the downstream side during installation work or maintenance, the above downstream end of the dust collecting side electrode plate prevents the tool etc. from contacting the applying side electrode plate. By doing so, a protection unit for protecting the electrode plate on the application side is formed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of a dust collecting element that employs a dust collecting portion according to an embodiment of the present invention, and FIG. 2 is a partially cutaway plan view of the dust collecting portion. Referring to FIG. 1, the dust collection element 10 includes a casing 11. The casing 11 has an air inlet 11a for introducing air to be cleaned therein and an outlet 11b for discharging the introduced air.
The two communicate with each other by an air passage 11c defined inside.

The air inlet 1 of the air passage 11c.
An ionization unit 12 is formed on the 1a side. The ionization part 12 is stretched near the air inlet 11a, and an ionization line 12a to which a high voltage of positive polarity (5 KV in this embodiment) is applied, and the ionization line 12a is orthogonal to the air path 11c. And a counter electrode plate 12b on the ground side facing each other in the direction.

On the other hand, a dust collecting section E is disposed downstream of the ionization section 12 in the air passage 11c. The application-side electrode plate E1 and the dust-collection-side electrode plate E2 in the present embodiment are alternately laminated in the air passage 11c with an interval allowing air to flow therethrough. The application-side electrode plate E1 includes a conductive member E11 to which a high voltage (2 KV in this embodiment) having the same polarity as that of the ionization wire 12a is applied, and a coating member E12 that covers the conductive member E11. More specifically, in the application-side electrode plate E1 of the present embodiment, a conductive resin is printed on a sheet material made of polyethylene terephthalate or the like, and a polyethylene terephthalate sheet material is laminated thereon. This is a so-called mold type electrode plate, and the conductive resin constitutes the conductive member E11, and the sheet material of polyethylene terephthalate constitutes the covering member E12.

On the other hand, the dust collecting side electrode plate E2 includes a bare conductive member E21 exposed to the outside and connected to the ground side electrode. Dust collecting side electrode plate E2 of this embodiment
Is embodied by a stainless plate having a thickness of 50 μm, for example. In FIG. 1, 13 is a power feeding unit,
The power supply unit 13 supplies a corresponding high DC voltage to the ionization section 12 and the dust collecting section E.

In FIG. 2, reference numeral 14 is a frame material for holding the electrode plates E1 and E2 in a state of being alternately laminated at intervals. In the above configuration, the conductive member E11 of the dust collecting side electrode plate E2 in the present embodiment is
At the time of stacking shown in FIGS. 1 and 2, a downstream end portion E22 extending longer downstream than the application side electrode plate E1 and an upstream end portion E22 extending longer upstream than the application side electrode plate E1.
And 23.

According to the configuration of this embodiment, the dust collecting side electrode plate E
When the conductive member E11 of No. 2 is laminated,
When the tool or the like faces the dust collecting portion E during installation work or maintenance, since it has a downstream end portion E22 extending longer than 1 and an upstream end portion E23 extending longer than 1 In the above, the downstream side end portion E22 and the upstream side end portion E22 of the dust collecting side electrode plate E2 are connected to the applying side electrode plate E2.
A protective portion is provided to protect the application-side electrode plate E1 by preventing a tool or the like from coming into contact with 1.

Therefore, according to this embodiment, the application side electrode plate E1 can be reliably protected by the downstream end portion E22 and the upstream end portion E22. Moreover, since it can be easily carried out only by changing the dimension setting of the dust collecting side electrode plate E2, the above effect can be obtained in the same manufacturing process as the conventional one, and the increase of the manufacturing cost can be suppressed. There are advantages. Further, since the conductive member E21 constitutes the downstream end E22 and the upstream end E22,
Therefore, there is an advantage that the dust collecting area becomes wider and the dust collecting efficiency can be improved.

Particularly in the present embodiment, since the conductive member E21 of the dust collecting side electrode plate E2 is a stainless plate,
There is an advantage that the covering member E12 of the application side electrode plate E1 can be protected more firmly. Furthermore, when the dust collecting part E is detached from the casing 11 or when the ion collecting part E is also provided with an upstream end part E23 that extends longer than the applying side electrode plate E1 as in the present embodiment. Even if some member enters from the 12 side, there is an advantage that the covering member E12 of the application-side electrode plate E1 can be protected by the upstream end portion E23.

The above-described embodiment is merely an example of the preferred embodiment of the present invention.
2a and the application side electrode plate E1 are applied with a negative polarity high voltage, and the dust collection side electrode plate E2 is electrically connected to the positive polarity electrode. It goes without saying that various design changes can be made within the range that does not change.

[0019]

As described above, according to the dust collecting portion of the electrostatic precipitator of the present invention, the downstream end portion of the dust collecting side electrode plate is
Since the protection part for protecting the application side electrode plate is constituted by preventing the tool etc. from coming into contact with the application side electrode plate, it is remarkable that the application side electrode plate can be reliably protected by this downstream end. Has a great effect. Moreover, since it can be easily carried out only by changing the dimension setting of the dust collecting side electrode plate, the above effect can be obtained in the same manufacturing process as the conventional one, and an increase in manufacturing cost can be suppressed. There is. Further, since the downstream end portion is constituted by the conductive member, there is also an advantage that the dust collecting area can be increased correspondingly and the dust collecting efficiency can be improved.

On the other hand, when the conductive member of the dust collecting side electrode plate is a stainless plate, there is an advantage that the covering member of the applying side electrode plate can be protected more firmly.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a dust collecting element using a dust collecting portion according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of the dust collecting portion.

FIG. 3 is a partially cutaway plan view of a conventional dust collecting portion.

[Explanation of symbols]

 E1 Application side electrode plate E11 Conductive member E12 Covering member E2 Dust collecting side electrode plate E21 Conductive member E22 Downstream end

Claims (2)

[Claims] 1. A conductive member (E11) which is electrically connected to an electrode on the application side.
And the applied side electrode plate (E1) including the covering member (E12) that covers the conductive member (E11) and the exposed conductive member (E2) that is electrically connected to the ground side electrode.
1) and the dust collecting side electrode plate (E2), and both electrode plates (E1, E2)
Is a dust collecting section of the electrostatic precipitator that is alternately laminated at intervals allowing air to flow and is arranged downstream of the ionization section (12) in the air path (11c) of the electrostatic precipitator. Then, the conductive member (E21) of the dust collecting side electrode plate (E2) has a downstream end portion (E22) extending to the downstream side longer than the applying side electrode plate (E1) at the time of stacking. Dust collection part of the characteristic electric dust collector. 2. A conductive member (E21) of the dust collecting side electrode plate (E2).
Is a stainless plate. The dust collecting part of the electrostatic precipitator according to claim 1.