KR0139672B1 - A circuit for producing sources of electricity - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gas removal and dust collection, and more particularly, to a power supply circuit of a gas removal and dust collection device capable of simultaneously performing gas removal and dust collection by generating a square wave pulse voltage.

The present invention makes the DC voltage by full-wave rectification of the input AC power, generates an oscillation pulse using the oscillation circuit, and then controls the transistor on / off with the oscillation pulse to control the DC voltage at the primary and secondary winding ratios of the transformer. Excited to generate a square wave high voltage with overshoot so that the gas can be removed and dust collection at the same time in the region containing the overshoot to remove the gas by a low-temperature plasma or thermal plasma chemical reaction, and at the end of the overshoot region When the voltage becomes stable, dust collection is performed by supplying a DC high voltage to the collecting electrode of the collecting unit.

Description

Power supply circuit of degassing and dust collector

1 is a power supply circuit diagram of a conventional PPCP gas removal apparatus.

2 is a rotary spark gap output waveform of FIG.

3 is a schematic diagram of a gas removal apparatus of a conventional SPCP method.

(a) is a front view,

(b) is a top view.

4 is a configuration diagram of a conventional two-stage dust collector.

5 is a power supply circuit diagram of the degassing and collecting device according to the present invention.

FIG. 6 is a diagram of a reactor applied to FIG.

(a) is a line-flat electrode shape diagram,

(b) is a line-cylinder electrode figure.

7 is an output voltage waveform diagram according to FIG.

* Description of the symbols for the main parts of the drawings *

16: rectifier 17: smoothing capacitor

18: oscillation unit 19: transistor

20: Trans

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gas removal and dust collection, and more particularly, to a power supply circuit of a gas removal and dust collection device capable of simultaneously performing gas removal and dust collection by generating a square wave pulse voltage.

Usually, the gas removal device uses a PPCP method and an SPCP method, and the dust collector uses a two-stage dust collector.

In the case of PPCP method, a line-plate electrode and a line-cylinder electrode are used.The principle is to accelerate chemically active atoms of electrically neutral atoms and to release electrons from neutral atoms, thereby removing chemically reactive chemically active species. It is plasma chemistry that uses low temperature plasma.

In this case, the power supply used must have a rising time of the voltage in nanoseconds (NANO SECOND) in order to accelerate the electrons of the neutral atom instantaneously.

As shown in FIG. 1, the power supply circuit of the conventional gas removal apparatus implementing the same includes a high voltage power supply unit 1 supplying a DC high voltage power and a DC high voltage through the resistor 2. A condenser 3 for discharging, a motor 4 for generating power, a rotary spark gap 5 that rotates at high speed with power generated by the motor 4 to generate sparks, and the rotary spark gap 5 It consists of an electrode (reactor: 6) that reacts with the output voltage generated at and removes the gas.

The conventional PPCP gas removal apparatus configured as described above supplies high voltage DC power from the high voltage power supply unit 1, and the high voltage power supplied through the resistor 2 is charged and discharged in the capacitor 3.

The high voltage discharged from the condenser 3 is applied to the rotary spark gap 5, where the rotary spark gap 5 is rotated at a high speed by the power generated by the motor 4 to discharge the spark, and as a result, the second As shown in the figure, a voltage having a rise time of several tens to hundreds of nsec is outputted.

Accordingly, the electrode (reactor: 6) removes gas by chemically reacting the low-temperature plasma at a high voltage at which the rise time applied is several tens to hundreds of nsec.

In the conventional SPCP gas removal apparatus, as shown in FIG. 3, the + electrodes 8 are formed in a predetermined arrangement on the fine ceramics 7, and the ground electrodes 9 are disposed below the fine ceramics 7. To form a gas to remove the gas.

In other words, the SPCP method generates a surface discharge by applying a high voltage and a high frequency voltage to the + electrode 8 formed on the fine ceramic 7, and causes the plasma chemical reaction to remove the gas by the surface discharge.

At this time, unlike the PPCP method described above, the SPCP method is a thermal plasma method.

In addition, the conventional dust collector is composed of only the ionizing portion is a two-stage type consisting of a single type of dust to attach the charged dust particles to the ionizing portion and the ionizing portion to charge the dust particles and the collecting portion for collecting the charged dust particles with Coulomb force. It is rough.

In the conventional two-stage dust collector, as shown in FIG. 4, the ionizing unit A includes a discharge electrode 10, a discharge counter electrode 11, which is a ground electrode, and an ionizing unit power supply terminal 12a for applying power. ), And a collecting part (B) consisting of a collecting electrode (13) for collecting dust, a collecting counter electrode (14) serving as a grounding electrode, and a collecting part power supply terminal (12b) for applying power.

The conventional two-stage dust collector is configured to apply DC high voltage power (DC3-5KV) to the discharge electrode 10 and the collecting electrode 13, respectively, at the ionizing unit power stage 12a and the collecting unit power stage 12b. do.

Thus, the discharge electrode 10 discharges sparks to charge the dust particles, and the collecting electrode 13 collects the charged dust particles with a Coulomb force to collect dust.

However, such a conventional degassing and dust collecting device is designed such that the waveform of the power supply voltage performs only one function (gas removing or collecting).

In other words, in the case of the gas removal device, a steep pulse is used in the case of PPCP method, and in the case of the SPCP method, there is a problem that dust collection is impossible because it is a high voltage high frequency power supply. There was a problem.

Therefore, the present invention is to solve the problems of the conventional gas removal device and dust collector as described above, the object of the present invention is to generate a square wave pulse voltage to remove the gas and the dust collection device at the same time to perform the dust collection device To provide a power supply circuit.

Technical means for achieving the object of the present invention is a rectifying means for full-wave rectifying the input power to a DC voltage, smoothing means for smoothing the DC voltage obtained from the rectifying means, oscillation to generate a constant pulse Means, a transistor switched on / off in response to a pulse obtained from the oscillation means, and a smoothed DC voltage in the smoothing means at the primary and secondary winding ratios according to the on / off of the transistor to excite the gas and collect the dust. It consists of a transformer that generates a square wave high voltage.

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

5 is a power supply circuit of the gas removal and dust collection apparatus according to the present invention, which is obtained from the rectifier 16 and the rectifier 16 for full-wave rectifying the input commercial power 15 to be a DC voltage as shown A smoothing capacitor 17 for smoothing a DC voltage, an oscillation unit 18 that oscillates to generate a constant pulse, a transistor 19 that is switched on / off in accordance with a pulse obtained from the oscillation unit 18, and the transistor ( 19) Excitation of the smoothed DC voltage at the smoothing capacitor 17 at the primary and secondary winding ratios to generate a square wave high voltage necessary for gas removal and dust collection and applying it to the gas removal and dust collection unit 21 according to ON / OFF. It was composed of a transformer (20).

The operation and effects of the gas removal and dust collecting apparatus according to the present invention configured as described above will be described with reference to FIGS. 6 and 7.

First, in the present invention, in order to simultaneously perform degassing and dust collection, a form of a reactor (for degassing) in the degassing and collecting part 21 is a line-plate electrode as shown in FIG. 6A, or (b). A line-cylinder electrode as shown in Fig. 1).

For collecting dust, a collecting part of a conventional two-stage dust collecting device (see FIG. 4) is used.

As shown in FIG. 5, the rectifier 16 is full-wave rectified by the commercial power (AC110V or AC220V) input to the bridge diode to make a DC voltage of a predetermined level. do.

The smoothing capacitor 17 smoothes the DC voltage to a DC voltage of a predetermined level, and is applied to the primary side of the transformer 20.

At this time, the oscillator 18 oscillates and outputs a constant pulse, and the transistor 19 switches on / off by the output pulse.

That is, while the pulse output from the oscillation unit 18 is high (H), the transistor 19 is turned on to flow a current applied to the primary side of the transformer 20 to the emitter, and thus the transformer 20 The voltage is induced to the secondary side by the turns ratio of the primary side and the secondary side.

At this time, if the primary power supply of the transformer 20 is sufficient, the square wave high voltage including the overshoot is generated by the inductance component inside the transformer 20 and supplied to the gas removal and collection unit 21. .

Accordingly, in the region (section C) where the overshoot is included in the square wave high voltage supplied, the gas removal and collection unit 21 supplies gas by plasma chemical reaction by low temperature plasma when the rise time of the voltage is about nanoseconds. If the rise time of the voltage is milliseconds larger than nanoseconds, the gas is removed by thermal plasma chemistry by the peak value of the voltage.

In addition, when the overshoot region (Section C), which is a transient period, ends and the stable voltage of the square wave is reached, a DC high voltage is supplied to the collecting electrode of the collecting unit to perform dust collection.

As described above, the present invention has the effect of generating a pulse of the square wave including the overshoot, and at the same time, the gas can be removed in the overshoot section and dust collection can be performed in the stabilization section of the square wave.

Claims (1)

Rectifying means for full-wave rectifying the input power to a DC voltage, smoothing means for smoothing the DC voltage obtained from the rectifying means, oscillating means for generating a constant pulse by oscillation; A transistor switched on / off in accordance with a pulse obtained from the oscillation means; It is composed of a transformer for generating a square wave high voltage including an overshoot so as to induce a smooth DC voltage in the smoothing means at the primary and secondary winding ratio in accordance with the on / off of the transistor so that gas removal and dust collection at the same time Power supply circuit for degassing and dust collecting apparatus.