JPS5917391Y2 - electric dust collector - Google Patents

Description

[Detailed description of the invention] This invention relates to an electrostatic precipitator that collects dust by charging it and electrically adsorbing it.The purpose of the invention is to prevent dust from adhering to discharge wires and maintain equipment. The goal is to make things better.

As shown in Fig. 1, the structure of the electrode section of a conventional electric precipitator is a plurality of dust collecting electrodes 11 arranged parallel to the air flow.
, a counter electrode 12 disposed between the plurality of dust collecting electrodes 11 , and a discharge wire 13 electrically connected to the counter electrode 12 to have the same potential and disposed in front of the counter electrode 12 . .

Then, when a voltage is applied between the dust collecting electrode 11 and the counter electrode 12, magnetic lines of force are concentrated in the space near the discharge line 13, which is kept at the same potential as the counter electrode 12, creating a high electric field and causing a discharge.

Here, the dust in the contaminated air flowing in from the intake port 14 is charged by the discharge from the discharge wire 13, and becomes charged dust.

This charged dust leaves the counter electrode 12 of the same polarity and is attracted and collected by the dust collecting electrode 11 of a different polarity.

This conventional electrostatic precipitator uses a discharge wire 1 to charge the dust.
3 is always located in contaminated air, dust, especially cigarette smoke, oil mist, etc., adheres to this discharge wire 13, and as a result, the magnetic lines of force are no longer concentrated, no discharge occurs, and the dust is no longer charged. As a result, there was a drawback that the dust collection efficiency was reduced.

As a countermeasure to this problem, it is possible to clean the discharge wire 13 to remove the adhering dust, but this work often causes the discharge wire 13 to break or lose its tension, making it difficult for ordinary home users to carry out. Met.

In order to solve this problem, the inventors created a shower of ions outside the dust-containing air stream without bringing the discharge wire 21 into direct contact with the dust-containing air, as shown in FIG. We have developed a method to charge dust particles by dropping them into the air.

In this method, relatively large particles such as oil mist and tar do not attach to the discharge wire 21, but fine particles get trapped in the ion generating part and attach to the counter electrode 22, and when used for a long time, the charging capacity increases. There was a problem that the

The present invention aims to improve the above-mentioned ion shower type electrostatic precipitator and maintain its performance by removing dust adhering to the counter electrode.Examples thereof will be described below with reference to the accompanying drawings.

In FIGS. 3 and 4, reference numeral 1 denotes a casing of an electrostatic precipitator, which has an intake port 2 for sucking in dust-containing air and an exhaust port 3 for discharging purified air.

Reference numeral 4 denotes a ventilation path formed between the intake port 2 and the exhaust port 3, and air is circulated through the ventilation path 4 by a fan 5.

Reference numeral 6 denotes an ion generating section formed in communication with the ventilation path 4, and in this embodiment, it is partitioned by a recess facing the ventilation path 4.

Reference numeral 7 denotes a discharge wire disposed within the ion generating section 6, which is disposed substantially perpendicular to the air flow and to which a positive voltage is applied.

Reference numeral 8 denotes a columnar or cylindrical counter electrode arranged parallel to the discharge wire 7, supported rotatably around an axis, and applied with a voltage so as to have a negative potential with respect to the potential of the discharge wire 7. is applied.

9 is a dust removal body made of soft material such as felt,
It is in contact with the outer peripheral surface of the counter electrode 8 to the extent that it does not affect discharge, and is fixed to the casing 1.

A bundle 10 is directly connected to the counter electrode 8, and by rotating this bundle, the counter electrode 8 is rotated.

Reference numeral 8a denotes a dielectric filter provided at the rear of the ventilation path 4 where it is not affected by the discharge caused by the discharge wire 7, and has the same potential as the counter electrode 8, and the dust charged by the discharge wire 7 is removed from the dielectric filter 8a. 8a, clean air passes through the fan 5 and is discharged from the exhaust port 3.

Ion generation in the ion generating section 6 and the charging state of dust will be explained as follows.

That is, when the discharge line 7 and the counter electrode 8 are made to face each other, an electric field distribution as shown in FIG. 4 is formed.

Therefore, a diverging electric field is formed from the discharge line 7 toward the opposite side of the counter electrode 8, and ions generated near the discharge line 7 move along this electric field, causing ions to form in the air passage 4 like a shower. It will drip.

Therefore, the dust in the contaminated air flowing through the ventilation path 4 is charged by the ion shower.

Most of the charged dust flows toward the rear filter 8a, but some of the dust, which has a relatively small penetrating force, flows into the ion generating section 6 and adheres to the counter electrode 8, which has a negative potential. However, by rotating the bundle 10, the counter electrode 8 rotates, and the dust attached to the counter electrode 8 is wiped off by the dust remover 9, and ions are released from the discharge wire 7. is always performed stably.

Note that the small dust that flows into the ion generating section 6 is charged with the same polarity as the discharge wire 7, so it does not adhere to the discharge wire 7 but to the counter electrode 8, so there is no need to remove dust from the discharge wire 7. It is.

As described above, according to the present invention, the counter electrode of the ion generating section for charging dust is formed into a columnar or cylindrical shape, and is rotatable, so that the dust removing body is in contact with a part of the counter electrode. Since the dust attached to the counter electrode is automatically wiped off by rotating the counter electrode, ions are always emitted stably from the discharge wire, and dust collection efficiency is improved without connecting the discharge wire. The practical value of this method is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional electrostatic precipitator, Fig. 2 is a sectional view of an ion shower type electrostatic precipitator already developed by the present inventors, and Fig. 3 is a sectional view of an electrostatic precipitator according to an embodiment of the present invention. 4 is a perspective view of a bundle portion combined with the counter electrode of the electrostatic precipitator, and FIG. 5 is an electric field distribution diagram showing the electric field distribution between the discharge wire and the counter electrode of the same electrostatic precipitator. 2...Intake port, 3...Exhaust port, 4...
...Vent passage, 6...Ion generation part, 7...
...Discharge wire, 8...Counter electrode, 9...
...Dust removal body.

Claims (1)

[Scope of utility model registration request] It has an air passage communicating the intake port and the exhaust port, an ion generation part facing the middle of this street 1, and a monkey dust part located in the ventilation passage behind the ion generation sound 1 and adsorbing charged dust, and The ion generating section is composed of a discharge wire, a cylindrical or cylindrical counter electrode arranged parallel to the discharge wire, and a dust removal body in contact with the outer circumferential surface of the counter electrode. An electrostatic precipitator that can rotate freely around the center.