SU1562027A1 - Apparatus for supplying electric precipitator - Google Patents

Abstract

The invention relates to the electrical cleaning of gases, can be used in the chemical and other industries, and allows us to simplify the device and increase its reliability. The device for powering the electrostatic precipitator contains a power unit 1 connected in parallel with the arrester circuit 2 and the switch 3 connected in series. The control input of the key 3 is connected to the generator 4 pulses. The power unit 1 through the reactor 6 is connected to the electrodes of the electrostatic precipitator 7. The divider 5 of the distribution voltage is connected in parallel to the circuit and the series-connected reactor 6 and the electrode 8 of the electrostatic precipitator 7, and its output is connected to the cathode of the switch 3. 1 sludge.

Description

(21) 4439354 / 24-26

(22) 13.06.88

(46) 05.07.90. Bul Number 17

(71) All-Union Scientific Research Institute of Electric Power Industry

(72) H. I. Juice

(53) 66.052-12 (088.8)

(56) USSR Author's Certificate No. 1220094, cl. B 03 C 3/68, 1984.

USSR Author's Certificate No. 1407552, cl. In 03 C 3/68, 1987.

(54) DEVICE FOR POWER SUPPLY ELECTROFILTER

(57) The invention relates to the electrical purification of gases, can be used

in the chemical and other sectors of the industry and allows you to simplify the device and increase its reliability. The device for powering the electrostatic precipitator contains a power unit 1 connected in parallel with the arrester circuit 2 and the switch 3 connected in series. The control input of the key 3 is connected to the generator 4 pulses. The power supply unit 1 through the reactor 6 is connected to the electrodes of the electrostatic precipitator 7. The voltage divider 5 is connected in parallel to the circuit and the series-connected reactor 6 and the electrostatic electrode 7, and its output is connected to the cathode of the switch 3. 1 sludge.

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The invention relates to electrical gas cleaning and can be used in the chemical, metallurgical and other industries.

The purpose of the invention is to simplify the device and increase its reliability.

The drawing shows a block diagram of a device for feeding an electrostatic precipitator.

The power unit 1 is shunted by a circuit formed by a series-connected uncontrollable arrester 2 and a key 3, to the control input of which the generator 4 is connected. The arrester 2 and the key 3 are shunted by a voltage divider 5. The anode terminal of the power unit 1 is connected to the reactor 6, which is connected to the second terminal to the discharge electrode of the electrostatic precipitator 7. The precipitating electrodes of the electrostatic precipitator are grounded.

The device works as follows.

The power unit 1 supplies the electrostatic precipitator 7 electrodes through the reactor 6 with a constant high voltage. Under the action of this voltage in the electrostatic precipitator, gas is cleaned from dust. The current unit 1 has a pulsating character. In the intervals when the current is absent, generator 4 starts with a certain frequency (5-10 Hz) key 3. The latter is turned on and, if the voltage on the corona electrode 7 of the electrostatic precipitator exceeds the voltage of the discharge discharge 2, the discharge pierces, and the circuit The transmitter of the corona electrode of the electrostatic precipitator 7 and the reactor 6 is shorted. An oscillatory process is created in this circuit, during which the polarity of the voltage on the filter 7 changes sign to the opposite. A change in the polarity of the voltage leads to an improved cleaning of the electrodes from the settled dust. The voltage on the electrostatic precipitator can sometimes decrease, for example

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when quartz insulators are not heated (leakage currents increase). If the voltage of the electrostatic precipitator 7 decreases below the beginning of the corona (i.e., below the voltage of the discharge spark 2), then when the switch 3 is turned on, the discharge 2 does not penetrate and the voltage on the electrostatic precipitator 7 does not change the polarity.

Thus, at lower voltages, energy losses associated with a change in the polarity of the voltage on the electrostatic precipitator are eliminated. In the absence of a corona current, the dust on the electrostatic precipitator electrodes does not condense and it is easily discharged when exposed to a shaking mechanism.

In this way, the device performs an automatic shutdown function at lower voltages. Divider 5 provides the division of voltages between the arrester and the key. Due to the automatic disconnection of the circuit, the electrostatic precipitator is simplified, because it does not require complicated automatic control, leading to complication and decrease in reliability.

Claims (1)

Invention Formula A device for feeding an electrostatic precipitator, containing a power supply unit connected through a reactor with electrodes of an electrostatic precipitator, and a key connected by an anode to the ground bus, and a control input to an output of a pulse generator, which, in order to simplify the device, additionally contains an uncontrolled arrester and a voltage divider, while the uncontrollable arrester is connected between the cathode of the key and the output of the power unit, the voltage divider is connected in parallel to the circuit consisting of series-connected reactors precipitator electrodes, and its output is connected to the cathode key.