JPH11221488A - Electric dust collecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric dust collecting apparatus for efficiently recovering dust adhering to dust collecting electrodes. SOLUTION: This electric dust collecting apparatus 7 comprises electric discharge electrodes 8 and dust collecting electrodes 4 mutually coupled and arranged in the air flow route of a box body. While transversely crossing an air flow route outlet, the dust collecting electrodes 4 are installed in the flow route outlet and a hammering mechanism 9 is installed in the dust collecting electrode 4. The electric discharge electrodes 8 having projections 5 only on the upstream side are installed on the downstream side of the dust collecting electrodes 4. Since dust discharged out of an outlet of the electric dust collecting apparatus 7 adheres to the dust collecting electrodes 4 on the upstream side by the electric discharge plate 8 in the final stage, dust removing efficiency is heightened by adding a small number of rows of electrodes. Moreover, even if the dust collecting electrodes 4 are hammered by recovering dust, the dust floating again adheres to the dust collecting electrodes 4 on the upstream side by the electric discharge plate 8 in the final stage, so that visible smoke evolution can be prevented and dust can efficiently be recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION An electric dust collector charges dust in the air by corona discharge generated between a discharge electrode and a dust collecting electrode, and adheres the charged dust to the dust collecting electrode to purify air. . TECHNICAL FIELD The present invention relates to an electric dust collecting device for efficiently collecting dust attached to a dust collecting electrode.

[0002]

2. Description of the Related Art As shown in FIG. 5, an electric precipitator has a plurality of discharge electrodes 1 arranged along an air flow path (arrow), and adheres dust and dust in the left-right direction of the discharge electrodes 1. Of a parallel type provided with a dust collecting electrode 2 for use. In the thus configured electric dust collector, when the air containing the dust m flows down in the direction of the arrow, the dust m is charged by corona discharge traversing the flow path and is adsorbed to the left and right dust collection electrodes 2. Then, the purified air is discharged.

As shown in FIG. 6, a plurality of discharge plates 3 are installed in the air flow path (arrows) across the flow path, and dust collection plates 4 are arranged above and downstream of the discharge plate. There is a cross-flow type electrostatic precipitator (see Japanese Patent Application No. 9-310276). Protrusions 5 are formed on the upper and downstream sides of the discharge plate, and a corona discharge is generated from this point toward the dust collecting plate 4 by applying a voltage. In the electric dust collector configured as described above, when the air containing the dust m flows down in the direction of the arrow, the dust m is charged in the discharge area and is attracted to the dust collecting plate 4 on the upstream side against the flow. Garbage not captured at this stage
Is charged in the discharge area on the downstream side and is adsorbed on the dust collecting plate 4 on the downstream side. As a result, the air at the required location is purified.

[0004]

The dust collecting plate 4
The dust attached to the dust collecting pole 2 (including the dust collecting electrode 2) is finally hammered to the dust collecting plate 4 to store the dust in the lower receiving tray.
However, when hammering, some of the dust may fall down, and some may re-float, so that the dust collecting plate 4 near the exit emits visible smoke to the outside. Therefore, it is desired to efficiently capture garbage.

An object of the present invention is to provide an electric precipitator for efficiently purifying air flowing through the inside of a housing.

[0006]

In order to achieve the above object, the present invention is directed to an electric precipitator in which a discharge electrode and a dust collection electrode are arranged in combination in an air flow path of a housing. A dust collection electrode is provided across the flow path at the flow path outlet, and a discharge electrode that discharges only upstream is provided downstream of the collection electrode.

According to a second aspect of the present invention, a discharge electrode and a dust collecting electrode are arranged in combination in an air flow path of a housing, and a dust collecting electrode is provided across the flow path at the most downstream of the flow path, and the dust collecting electrode is provided. Discharge electrodes that discharge only on the upstream side are provided on the downstream side.

According to a third aspect of the present invention, in the first or second aspect, a hammering mechanism is provided on at least the last stage of the dust collecting electrode.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Electric precipitator 6 shown in FIG.
Is provided with a dust collecting electrode (a plurality of dust collecting plates) 4 across the flow path at the outlet of the flow path of the electric precipitator 7 in which the discharge electrode and the dust collecting electrode are combined. A plurality of discharge plates 8 having the projections 5 are provided. The arrangement of the discharge electrode and the collection electrode of the electric precipitator 7 may be either a parallel type or a cross flow type.

The plurality of installed dust collecting plates 4 may be hit at once by a hammering mechanism to remove attached dust, but at least the final plurality of dust collecting plates 4 of the electric dust collecting device 6
As shown in FIGS. 3 and 4, a plurality of dust collecting plates 4 are connected to each of the divided units, and the hammering mechanism 9 strikes each of the divided dust collecting plates 4. As an example, the plurality of dust collecting plates 4 are divided into four groups of five sheets.

A hammering mechanism 9 is provided at a side edge of the plurality of dust collecting plates 4, and a rotating shaft 11 for operating the hammer 10 is provided. The rotating shaft 11 is provided at four height positions of the rotating shaft 11. , A cam 1 through a gear (bevel gear, worm gear, etc.) 12
3 is provided so as to rotate on a vertical plane. Cam 13
A rotatable hammer 10 is arranged to be engageable with each of them, and the hammer 10 strikes a hammering rod 14 that reaches each of the divided dust collecting plates 4. As shown in FIG. 4, the hammering rod 14 is
The hammer 10 is inserted into a pipe 15 attached to the hammer 10 and abuts against the side surface of the target dust collecting plate 4.

Since the cam 13 has a different mounting angle so that the timing of hammering is different,
The hammer 10 is successively engaged by the rotation of the cam 13, separates at different timings, and strikes the hammer 14 by its own weight. As a result, the dust collecting plate 4 is hammered with a small force, and the lump of refuse falls without being finely divided, so that the total amount of instantaneous re-floating caused by hammering is extremely small. Further, the re-suspended dust can be re-adhered to the dust collecting plate 4 on the upstream side by the discharge plate 8 at the final stage, and the generation of visual smoke can be prevented.

As shown in FIG. 2, when the electric precipitator 7 is of a cross flow type, a plurality of dust collecting plates 4 to be attached can be shared by the dust collecting plate 4 at the last stage of the electric precipitator 7. . Further, when the hammering mechanism 9 is provided in the electric dust collector 7, no interference occurs with the discharge plate 8 to be attached, and the installation work is simple.

[0014]

As described above, according to the present invention, a plurality of dust collecting plates are provided across the flow path at the outlet of the flow path of the electric precipitator, and a discharge plate discharging only upstream is provided downstream of the dust collecting plate. Since it is an electric precipitator installed, the dust removal performance can be improved by adding only a small number of arrays, and even if the dust collection plate is hammered to collect the dust, the re-floating dust is discharged by the final discharge plate. Since it re-adheres to the dust collecting plate on the upstream side, generation of visual smoke can be prevented. Further, in a cross-flow type electrostatic precipitator, the above effects can be obtained only by providing a discharge plate, and the construction cost can be reduced. In addition, by dividing the plurality of dust collecting plates and hammering them at a different timing with a small force, the amount of fall increases and the total amount of re-suspension decreases, so that dust can be collected more effectively.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric precipitator according to an embodiment of the present invention.

FIG. 2 is a perspective view of an electric precipitator according to another embodiment.

FIG. 3 is a front view of a dust collecting electrode according to the embodiment.

FIG. 4 is a side sectional view of the dust collecting electrode shown in FIG. 3;

FIG. 5 is a plan view of a conventional parallel type electrostatic precipitator.

FIG. 6 is a perspective view of a conventional cross-flow type electrostatic precipitator.

[Explanation of symbols]

 4 Dust collecting electrode 5 Projection 7 Electric dust collector 8 Discharge electrode 9 Hammering mechanism

Claims (3)

[Claims] 1. A dust collection electrode is provided across a flow path at a flow path outlet of an electric precipitator in which a discharge electrode and a dust collection electrode are arranged in combination in an air flow path of a housing, and at a downstream side thereof, An electrostatic precipitator comprising a discharge electrode that discharges only on the upstream side. 2. A discharge electrode and a dust collecting electrode are arranged in combination in an air flow path of a housing, a dust collecting electrode is provided across the flow path at the most downstream of the flow path, and an An electrostatic precipitator characterized by having a discharge electrode that discharges only on the side. 3. The electric precipitator according to claim 1, wherein a hammering mechanism is provided at least in the last stage of the precipitating pole.