SU1421409A1 - Apparatus for electric precipitator power supply - Google Patents

Abstract

The invention relates to the electrical cleaning of gases, can be used to supply an electrostatic precipitator with pulsed voltage and allows an increase in the degree of purification of gas containing high-dust. The device for powering the electrostatic precipitator contains a transformer 1, the first winding of which is connected to the industrial network through the thyristor regulator 2, and the secondary winding to the input of the rectifier 3, the reactor 4 connected to the first output with the negative output of the rectifier 3 and to the output connection of the electrostatic precipitator 5, a series from capacitor 6 and diode 7 connected to the second output of reactor 4, switch B, which is connected in parallel to diode 7 and whose control input is connected to the output of circuit 9 AND, generator 10, whose output is It is one with the first input of the circuit I, the second input of which is connected to the output of trigger 1 and through a resistor 12 to the locking input of the regulator 2, and the synchronizer 13 connected to the input of trigger 11, and the input to a remote network , 2 Il. iX (L

Description

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The invention relates to the field of electrical gas cleaning and can be used to supply electrostatic precipitators with pulsed voltage.

The aim of the invention is to increase the degree of purification of gas a containing high-resistance dust,

Fig. 1 shows a block diagram of a device for powering an electrostatic precipitator; Fig. 2 shows voltage diagrams on circuit elements, where U is the network voltage,., The clock pulse at the output of the synchronizer, U, is the output trigger signal, Ug- control pulses of the key, and is the voltage across the electrostatic precipitator electrodes.

The device (Fig. 1) contains a transformer 19 whose primary winding is connected via an thyristor controller 2 to the industrial network, and the secondary winding of transformer 1 is connected to the input of the rectifier 3. The positive terminal of the gate 3 is grounded, and the negative terminal is connected to the reactor 4 and with a lead for connecting electrbf1 –tra 5. The second lead of reactor 4 is connected to the main circuit from capacitor 6 and diode 7. Parallel to diode 7 is the key 8, which controls the input of which is connected to the output of circuit I 9.9 is connected to the output of the generator 10, and the second input to the output of the trigger 11 and through a resistor 12 to the locking input of the regulator 2, the synchronizer 13 output is connected to the input of the counting trigger 11, and the input to the industrial network

The device works as follows (Fig, 1) ..

The voltage applied to the primary winding of the transformer 1 regulates with the known method using the thyristors of the controller 2 due to the change in the phase of the shots given as

The voltage of the primary winding is increased by transformer 1 from the level of 100-380 V to 15-50 kV on the secondary winding with After straightening with rectifier 3, the high voltage is applied to the electrodes of the electrostatic precipitator 5, where the gas clears from the voltage . Once for each period of change in the network voltage (at the time of the transition, the

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ns: networks through zero to the positive side) the synchronizer 13 sends a pulse and, J (FIG. 2) to the input of the trigger 11 (FIG. 1), which, switching at a frequency of 25 Hz, for one period delivers a blocking signal and, ( Fig. 2) to the input of the thyristor controller 2 (Fig. 1). During this period, the input of the AND 9 circuit receives a trigger signal 11, allowing the generator 10 to pass through the key 8, the generator 10 operates at a frequency of 100 Hz, Key 8j including by means of a resonant circuit formed by reactor 4 and condenser f, generates impulses On the electrostatic precipitator 5 (Fig. 2), during the subsequent period of variation of the mains voltage, the trigger 11 removes the locking voltage from the thyristor controller 2 and the unlocking voltage from the circuit 9. At the same time, the thyristor controller 2 supplies voltage to the transformer 1 which, via rectifier 3, applies a voltage to the electrostatic precipitator electrode 5, the pulses of the generator 10 to the switch 8 through the circuit 9 do not pass,

Claims (1)

Invention Formula A device for feeding an electrostatic precipitator containing a transformer, the primary winding of which is connected to a thyristor controller, and BOTPMina - to a rectifier, a reactor, the first output connected to the output of the mitel and the electrostatic filter, key and generator of it-pulses, different from In order to increase the degree of gas purification containing; - a high-resistance pish, a condenser, a diode, a resistor, a synchronizer, a trigger and an I circuit are added to it, the second reactor output is connected via a capacitor to the diode and the output of the switch, input three the hryger is connected to the synchronizer output, the input of which is connected to the network outputs of the thyristor controller, the first input I is connected to the pulse generator, the second to the trigger output and through a resistor to the locking input of the thyristor regulator, and its output to the control input of the key . .Z