JPH0248047Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a so-called electrostatic precipitator that charges dust in dust-containing air and collects it on an electrode, and more specifically relates to an electrostatic precipitator. It is related to the structure of

Conventional technology In a conventional electrostatic precipitator, opposing electrode plates are provided on both sides of a linear or rod-shaped discharge electrode in parallel with the discharge electrode to form a charging section, and electrode plates of different polarities are alternately connected to the charging section. There is an electrostatic precipitator that has dust collecting sections arranged in parallel, but since the electrode plates of this precipitator face electrodes of different polarity in parallel, they receive strong electrostatic force, so care must be taken to avoid bending. In order to achieve this, thin electrode plates have the disadvantage of having to be reinforced, and since corona wind blows out from the discharge wire in all directions, the supplied air flow collides with the corona wind, causing turbulence. As a result, uneven discharge occurred, resulting in a disadvantage that the dust collection performance was reduced.

An example of an electrostatic precipitator whose electrodes exhibit strong resistance to electrostatic force is the device disclosed in Utility Model Application Publication No. 56-64756, which has a discharge needle and a repulsion electrode inside a cylindrical electrode. When using multiple cylindrical electrodes, the manufacturing process is complicated, and the number of cylindrical electrodes in the flow path cannot be more than the number equivalent to close packing, so if the wind speed becomes high, dust collection will be difficult. The drawback was that the residence time of dust in the area was shortened, resulting in poor dust collection performance.

Also, as in Utility Model Application Publication No. 49-142869, two strip-shaped metal plates bent in a diagonal shape are butted against each other, and a discharge wire is provided through a vent hole punched in the butted portion. This is a dust collection device, and the ventilation holes of this device are made as if the holes are made in two metal plates that are inclined toward the flow path and intersect with each other, and the width corresponds to the width of the ventilation hole. Since corona discharge occurs vertically and horizontally from the discharge wire to the periphery of the hole, the air flow supplied to the corona wind collides with the corona wind, creating turbulent flow, resulting in uneven discharge and reduced dust collection. It was hot.

Problems to be Solved by the Invention The present invention eliminates the above-mentioned drawbacks of the conventional device, so that even thin electrode plates do not bend, and the residence time of dust-containing air is long, resulting in poor dust collection performance. excellent,
Another object of the present invention is to provide an electrostatic precipitator that is easy to manufacture.

Next, the configuration of the present invention will be explained based on examples.

Embodiment FIG. 1 is a cross-sectional view of an electrostatic precipitator according to an embodiment of the present invention.
It is composed of a discharge wire 3 provided inside a cylindrical body 6 forming an air flow path 2 and an electrode member 8. A zigzag-shaped conductive member formed by joining another conductive plate 1 adjacent to the edge thereof,
Each conductive plate 1 is provided so as to diagonally cross the flow path 2.

The holes 4 of each conductive plate 1 are provided so that their centers lie on the same axis without intersecting each other, and the discharge wire 3 is stretched over the axis. A high voltage power source 5 is provided between the conductive plate 1 and the discharge wire 3 in order to apply a high voltage between them.

FIG. 2 is a sectional view showing another embodiment of the present invention. A plurality of conductive plates 1 are cut and placed at intervals, and the conductive plates 1
The holes 4 provided in each of the holes 4 are arranged so that their centers are located on the same axis without intersecting each other, and the discharge wire 3 is stretched on the axis, and the discharge wire 3 and the conductive plate 1 are connected to a high voltage power source 5 so that a high voltage is applied between them.

Means for Solving the Problems As explained in the above embodiments, in order to solve the problems of the prior art mentioned earlier, the present invention provides an electrostatic precipitator in which air flow paths 2 are diagonally crossed and spaced apart. A plurality of conductive plates 1 are provided with the conductive plates 1 placed, holes 4 are provided in each of the conductive plates 1, and the centers of the holes 4 are located on the same axis without intersecting each other. The discharge wire 3 is stretched and a means for applying a high voltage between the conductive plate 1 and the discharge wire 3 is provided.

The conductive plates 1 in the present invention include conductive plates arranged approximately parallel to each other at intervals as shown in the embodiment of FIG. 2, as well as conductive plates arranged adjacent to each other as shown in the embodiment of FIG. It may also be a conductive plate forming the waveform conductive member 8 formed by connecting two conductive members 1 at their edges.

In addition, a plurality of conductive plates 1 are arranged as shown in FIG.
It is also possible to form a single piece by bending two conductive thin plates.

Next, the effects of the present invention will be explained.

Operation Now, in the electrostatic precipitator of the present invention having the above-described configuration, when a high voltage is applied between the conductive plate 1 and the discharge wire 3 by the high voltage power supply 5, a strong electric field is generated between them. Corona discharge is generated from the discharge wire 3 toward the edge of the hole 4 formed in the conductive plate 1.

Under such circumstances, when dust-containing air is fed into the flow path 2 from the direction of the arrow by a blowing means (not shown), the dust in the air becomes charged by the corona discharge while passing through the hole 4. Then, the dust is deposited on the conductive plate 1 by the action of the electric field.

The discharge wire 3 in the present invention is stretched on an axis connecting the centers of holes 4 formed in a plurality of conductive plates 1 provided at intervals, so that the discharge wire 3 passes through the holes 4 and extends through the conductive plates 1. 1, and therefore, when a high voltage is applied between the conductive plate 1 and the discharge wire 3, the electrostatic force applied to the conductive plate 1 is different from that in the conventional case where the electrode plate is parallel to the electrode of different polarity. Unlike the electrostatic force applied to the electrodes in the electrostatic precipitator, the electrostatic force is not strongly applied from one direction over the entire surface of the electrode plate, so the conductive plate 1 of the present invention does not bend even if it is made of a thin plate. .

In addition, in the present invention, the holes 4 provided in each of the conductive plates 1 inclined in the flow path are arranged so that their centers are located on the same axis without intersecting each other. Since one side of the electric wire always faces the conductive plate 1 in close proximity, corona discharge occurs only toward the conductive plate 1 that faces the conductive plate in close proximity. Unlike discharge wires stretched between parallel plates or discharge wires inserted through mutually intersecting holes, the discharge does not occur in all directions.

Therefore, in the present invention, air is constantly supplied to the corona wind from the non-discharging side of the discharge wire, so unlike in the conventional device, the corona wind and the supplied air collide and create turbulence. Therefore, in the present invention, uneven discharge does not occur and the dust collection performance does not deteriorate.

In addition, in the present invention, since the holes 4 are provided in the conductive plate 1 that diagonally crosses the flow path, by changing the inclination angle of the conductive plate 1, the number of holes 4 can be changed to correspond to close packing with respect to the flow path. Since the number of electrodes can be made larger than the number of electrodes, the flow velocity in the hole 4 can be suppressed even if the flow velocity becomes large, unlike the conventional method using a cylindrical electrode.

Therefore, even if the flow velocity is high, the residence time of the dust in the charging section is long, so the dust collection performance is excellent.

Effects of the invention The present invention does not use any cylindrical electrodes, which are complicated in the manufacturing process, and as mentioned above, even if the conductive plate is thin, it does not bend, so there is no need to reinforce it.
Therefore, the present invention provides an electrostatic precipitator that is easy to manufacture.

Further, according to the present invention, there is no occurrence of uneven discharge, and the residence time of dust in the charged part can be increased, so that excellent dust collection performance can be obtained.

[Brief explanation of the drawing]

1 and 2 are respectively sectional views of one embodiment of the present invention, and FIG. 3 is a perspective view of one embodiment of the conductive member of the present invention. 1... Conductive plate, 2... Air flow path, 3... Discharge wire, 4... Hole, 5... High voltage power supply, 6... Cylindrical body,
7... Insulator, 8... Conductive member, 9... Bosom, 10...
...Terminal.

Claims (1)

[Claims for Utility Model Registration] (1) In an electrostatic precipitator, a plurality of conductive plates 1 are provided diagonally across the air flow path 2, and the conductive plates 1
A hole 4 is provided in each of the holes 4, and the centers of the holes 4 are located on the same axis without intersecting each other.A discharge wire 3 is stretched across the flow path on the axis, and a conductive An electrostatic precipitator characterized in that means for applying a high voltage between a plate 1 and a discharge wire 3 is provided. (2) The electrostatic precipitator according to claim 1, wherein the plurality of conductive plates 1 are conductive plates arranged substantially parallel to each other at intervals. (3) Utility model registration claim 1, in which a plurality of conductive plates 1 are connected to other conductive plates 1 adjacent to each other at their edges to form a corrugated conductive member 8.
Electrostatic precipitator as described in section.