JPS6136984B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrostatic type electric precipitator, and particularly to the configuration of its dust collecting electrode.

Structure of a conventional example and its problems As shown in FIG. 1, the structure of a conventional electrostatic precipitator of this type is that two dust collecting electrode plates 101 are provided inside a main body casing 100, and these two dust collecting electrode plates 10
1, dust-containing air is sent by the blower 102 and flows. An ionization line 103 and an accelerating electrode 104 are provided between the dust collecting electrode plates 101 facing the dust-containing air flow. The ionization line 103, the accelerating electrode 104, and the two dust collecting electrode plates 101 are connected to a high voltage power source 105 so as to have the same polarity.

In the electrostatic precipitator having the above configuration, oil mist in the dust-containing air is charged by corona discharge at the ionization wire 103, and is further charged by the accelerating electrode 1 at the rear.
04 and the dust collection electrode plate 101 due to the electric field due to the high voltage applied between the dust collection electrode plate 101 and the dust collection electrode plate 101. Maintenance of the dust collecting electrode plate 101 is usually carried out by washing with detergent, but in reality it is very difficult to remove and cannot be done by ordinary users, so the maintenance cost is very high. .

OBJECTS OF THE INVENTION It is an object of the present invention to provide an electrostatic precipitator that eliminates such conventional drawbacks and whose dust collection electrodes are easy to maintain.

Structure of the Invention The electrostatic precipitator of the present invention has a dust collecting electrode formed by coating a resistor on one side of an insulator and an oxidation catalyst on the other side.

Therefore, oil mist adhering to the dust collecting electrode is oxidized and decomposed by the oxidation catalyst heated by the heat generated by the resistor.

Description of examples Examples thereof will be described below based on the drawings.

In Figures 2 to 4, 1 is the main casing;
Two dust collecting electrodes 2 are arranged inside. This dust collecting electrode 2 is constructed by coating a heat generating resistor 4 on one side of an insulator 3 such as ceramic, and coating a conductive oxidation catalyst 5 such as platinum on the other side. The two dust collecting electrodes 2 are arranged so that their oxidation catalysts 5 face each other, and an ionization line 6 and an accelerating electrode 7 are provided between them along the dust-containing air flow. Further behind there is a blower 8. and ionization line 6 and accelerating electrodes 7 and 2
The two dust collecting electrodes 2 are connected to a high voltage power source 9 so as to have the same polarity. Further, the resistor 4 is connected to a power source.

In the above configuration, the oil mist in the dust-containing air is charged by corona discharge at the ionization line 6, and furthermore, due to the electric field due to the high voltage applied between the rear accelerating electrode 7 and the dust collecting electrode 2, the dust collecting electrode 2 is collected by. The oxidation catalyst 5 of the dust collection electrode 2 is heated through the insulator 3 because the resistor 4 connected to the power source generates heat. Therefore, the oil mist adhering to the oxidation catalyst 5 is oxidized and decomposed and scattered.

For this reason, the dust collecting electrode 2 is constantly cleaned.
Maintained in a dust-free condition.

FIG. 5 shows another embodiment, 9a, 9b
is a changeover switch, and during dust collection, only the blower 8 is energized, but the resistor 4 is not energized, and only oil mist is deposited on the oxidation catalyst 5 of the dust collection electrode 2.
Next, when cleaning is performed by switching the changeover switches 9a and 9b, the blower 8 is energized through the rotation speed limiter 10, which is made of a resistor or the like, so that the air volume decreases. Therefore, the resistor 4 is energized and the oxidation catalyst 5 of the dust collecting electrode 2 is cleaned, but
At this time, as the air volume is decreasing as mentioned above,
The amount of heat generated by the resistor 4 may be small, which makes it more economical, and also reduces the rise in temperature in the room.

FIG. 6 shows another embodiment, in which changeover switches 11a and 11b are used to stop the blower 8 during cleaning, thereby minimizing the temperature rise in the room during cleaning.

7-8 show other embodiments. In FIG. 7, a resistor 4 is sandwiched between two insulators 3, and an oxidation catalyst 5 is coated on the other side.
By doing so, as shown in FIG. 8, the dust collection section can be configured in multiple stages, and the dust collection efficiency can be improved.

Effects of the invention By configuring the dust collecting electrode by providing a resistor on one side of the insulator and an oxidation catalyst on the other side, electricity is applied to the resistor to heat the oxidation catalyst, and the oil mist attached to the catalyst can be removed. can be decomposed by oxidation,
This makes it possible to effectively clean the dust collection electrode, and it is also inexpensive and requires little effort, which is of great value.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a conventional electrostatic precipitator, Fig. 2 is a sectional view of a dust collection electrode of an electrostatic precipitator of the present invention, Fig. 3 is an overall sectional view, Fig. 4 is a wiring diagram of a resistor, Fig.
FIG. 6 is a wiring diagram of another embodiment, FIG. 7 is a sectional view showing another embodiment of the dust collecting electrode, and FIG. 8 is a sectional view of a dust collecting section incorporating the same. 2... Dust collecting electrode, 3... Insulator, 4... Resistor, 5... Oxidation catalyst, 9a, 9b, 11a, 11
b...Selector switch.

Claims (1)

[Scope of Claims] 1. An electric precipitator in which a dust collecting electrode is constructed by coating a resistor on one side of an insulator and an oxidation catalyst on the other side. 2. The electrostatic precipitator according to claim 1, in which a resistor is sandwiched between two insulators, and an oxidation catalyst is applied to each outer surface of the insulators to form a dust collection electrode. 3. The electrostatic precipitator according to claim 1, which has a changeover switch that energizes the blower via a rotation speed limiter when the resistor is energized.