JPS6038976B2 - electric dust collector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrostatic precipitator that charges dust and collects the dust by electrically adsorbing it, and an object thereof is to obtain an electrostatic precipitator with high charging efficiency. .

The present inventors have developed an innovative electrostatic precipitator that can charge passing dust without directly exposing the discharge wire and counter electrode to a ventilation path.

As shown in FIG. 1, this is because the dust in the dust-containing air taken in from the intake air 100 is located outside the air passage 101 and is irradiated with ions formed in the ion generator 102 facing the air passage 101. The rear dielectric filter 1
It is of the structure captured in 03.

The clean air then passes through the fan 104 to the exhaust port 105.
released from. In addition, the ion generating section 102 has a discharge wire 106.
and a counter electrode 107, each of which is connected to a power source 108. The flow of ions generated at this time occurs along the lines of electric force shown in FIG. Therefore, not all of the ions generated by the corona discharge are irradiated toward the ventilation path, and a considerable portion flows to the counter electrode 107. Therefore, if dust particles are to be sufficiently charged, consideration must be given to increasing the discharge current, and improvements in this respect have been desired. The present invention aims to eliminate the above-mentioned conventional drawbacks, and embodiments thereof will be described below based on the drawings.

In FIG. 2, 1 is the casing of the electrostatic precipitator, and 2 is the intake □ of this casing, into which dust-containing air is drawn.

3 is an exhaust port of the casing 1, from which purified air is exhausted.

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

Reference numeral 6 denotes an ion generating portion formed by passing through the ventilation path 4, and in this embodiment, it is constituted by a recessed portion facing the ventilation path 4. Reference numeral 7 denotes a discharge line disposed within the ion generating section 6, to which a positive voltage is applied in this embodiment.

Reference numeral 8 denotes a counter electrode provided to the discharge wire 7 in a direction substantially perpendicular to the air flow flowing in front of the ion generating section 6 and on the opposite side of the ventilation path 4, and is grounded to the discharge wire 7. There is.

Reference numeral 9 denotes a reflective electrode provided on the opposite side of the discharge wire 7 to the counter electrode 8 so as to be substantially perpendicular to the air flow flowing through the ventilation path, and is connected to the same polarity as the discharge wire.

1. In the air passage 4, a dielectric filter is provided at the rear where the discharge wire 7 does not affect the counter electrode 8.
The dust that is also grounded and charged by the discharge wire 7 is
The clean air captured by the dielectric filter 10 passes through the fan 5 and is discharged from the exhaust port 3.

In the above configuration, the generation of ions in the ion generator 6 and the charging state of dust will be explained.

The lines of electric force formed by the discharge line 7, the counter electrode 8, and the reflective electrode 9 are as shown in FIG. 4, and the flow of ions generated near the discharge line 7 at that time is as shown by the arrow →.

In other words, due to the electric field generated by the reflective electrode 9 and the counter electrode 8, very few ions move toward the anti-discharge line 7 of the counter electrode 8, and the amount of ions exiting toward the ventilation path 4 is larger than in the conventional case. Since the dust is sufficiently charged, the dust collection efficiency can be increased. Note that the reflective electrode and discharge wire may not be connected directly, but may be connected through a resistor, and if the electrodes are of the same polarity, even if the voltage is low, the charging efficiency will be better than the conventional one, although the effect will be weakened. It can be done.

- Thus, according to the present invention, by providing a reflective electrode on the opposite side of the counter electrode, the charging efficiency can be increased, and its industrial value is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional electrostatic precipitator, FIG. 2 is a diagram showing the electric field distribution between electrodes of a secondary electrostatic precipitator, FIG. 3 is a cross-sectional view of an electrostatic precipitator according to an embodiment of the present invention, and FIG. The figure shows the electric field distribution between the electrodes of the same electrostatic precipitator. 2...Intake □, 3...Exhaust port, 4...
...Vent passage, 6...Ion generation section, 7...Discharge line, 8...Counter electrode, 9...Reflecting electrode. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. It has an air passage connecting an intake port and an exhaust port, and an ion generation part located outside this ventilation passage and facing the same ventilation passage, and a discharge wire in the ion generation part, and a discharge wire connected to the discharge wire. A counter electrode located on the opposite side of the ventilation path, and for this counter electrode,
An electrostatic precipitator characterized in that a reflective electrode is provided on the opposite side of the discharge wire, a high voltage is applied between the discharge wire and the opposing electrode, and the reflective electrode and the discharge wire are of the same polarity.