SU1306597A1 - Arrangement for pulsed feed of electric precipitator fields - Google Patents

Abstract

The invention relates to a pulsed technique and can be used to feed a multi-field electrostatic precipitator for gas cleaning. The purpose of the invention — improving reliability — is achieved by reducing the pulse current of a commutating thyristor key. The device contains three controlled rectifiers 1-3, a floor of 4-6 electrostatic precipitators, a choke 10, a switching thyristor switch 11, a generator 12 and start-up pulses. To achieve this goal, voltage sensors 7–9, delay block I3, switching block 14, control blocks 15–17 and AND elements 18–20 are introduced by the number of fields of the electrostatic precipitator. The increase in reliability is ensured by a threefold decrease in the pulsed current, flowing through it through the switching thyristor switch 11. I Il. I (L with about O5 ate WITH

Description

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The invention relates to a pulse technique and can be used to power a multi-field gas cleaning electrostatic filter.

The aim of the invention is to increase reliability by reducing the pulse current of the switching thyristor switch.

The drawing shows the circuit device.

The device contains several, for example, three, controlled rectifiers 1-3, a floor 4- (3 electrostatic precipitators, voltage sensors 7-9, a choke 10, a switching thyristor switch 11, a generator 12 trigger pulses, a delay unit 13, a block 14 ko. m- .mutation, blocks 15–17 of the control and e.Chemes and 18–20.

Positive output control of my I-3 rectifier is combined. The cathode of the commutating thyristor switch 1 1 is connected to the common bus and the collecting electrodes of the 4-6 fields of the electrostatic precipitator, and its control electrode is connected to the output of the generator 12. The combined positive output spikes of rectifiers 1-3 are connected via the choke 10 to the anode of the switching thyristor switch 11, The negative output busbars of the terminals 1-3 are connected to the corona electrodes of the fields 4-6 of the electrostatic precipitator and with the first input terminals of the sensors 7-9. The outputs of the sensors 7-9 through the blocks 15-17 of the control are connected to the first inputs of the electromypes 18-20, the second inputs of which are connected to the outputs of the switching unit 14. The outputs of the elements And 18--20 are connected to the corresponding inputs of controlled rectifiers 1-3, and the input of the switching unit 14 through the delay unit 13 is connected to the output of the generator 12 trigger pulses, the second input terminals of the sensors 7-9 are connected to the common bus.

The device works as follows.

The output voltage of the rectifier units 1 to 3 is regulated by blocks 18-20, respectively. When applying start-up pulses from the heptation 12 to the control input of the thyristor switch 11 with a predetermined frequency (10-100 Hz), the latter is turned on and the energy of the rectifiers is transferred to one of the fields of the electrostatic precipitator. In this case, the amplitude of the current and its rate of increase are limited by the choke 10. Such energy transfer from the rectifier 1-3 to the corresponding zero 4-6 occurs alternately.

Each start pulse, except for switching on key 11 through delay unit 13, causes switching of switching unit 14. The latter in turn gives a signal

to the input of elements 18-20, the very supply of impulses of controllers 15-17 to control inputs 1-3, in the pause between the switch keys 11.

Thus, after passing the next impulse of the starting switch I1, the charge of one capacitor, of rectifiers 1-3, occurs. After the blowing impulse of the start of the key, the current of the electrostatic precipitator discharges this energy. those of this impulse current, the commutation switch 11 flows, decrease by 15 times (in this case, for). Such a decrease in impulses through the key leads to an increase in ness. In addition, the thyristor power can be set off. Energy losses are also reduced.

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Claims (1)

Invention Formula A device for a pulsed electrostatic precipitator containing rectifiers according to the number of positive fields of which the switching thyristor of which is connected to the common blue electrodes of the electric fields, and the winding electrode and the output of the heater pulser are choked. reliability by means of a pulse current switching key, in which there is an additional delay unit, a switching unit voltage sensors, units of packing elements I - by the number of fields, the positive outputs of the controlled rectifiers are connected to the anode The switch key is negative, the rectifier buses are connected but to the corona electrostatic precipitator and to the first inlet waters of the voltage sensors, whose terminals are connected, and the sensor outputs, for example, the corresponding blocks are controlled with the first inputs; the switching unit is connected to the output by the start-up generator, and the control inputs of the rectifiers, respectively Element Outputs I. Compiler V. Etorkin Editor L. Wesslovska Tech.hr I. E5resignorizer .A5imokosov Order 1356/6 Circulation 512 Subscription VIIIGII State11} 10G () Committee (C (R for inventions and discoveries 1 13035, Moscow. F 35, G Aushska nab. D. 4/5 roizv () detvenno граligra (|) iredi riti, t. Uzhgorod, ul. Project, 4 to the input of elements 18-20, thereby allowing the supply of control pulses from blocks 15-17 to the control inputs of rectifiers 1-3, in the pause between the switching on of the thyristor key 11. Thus, after the passage of each successive impulse to start the thyristor switch I1, only one capacitor is included, which is part of rectifiers 1-3. After the next impulse of the start of the key 11 appears, this energy is discharged into the corresponding field of the electrostatic precipitator. As a result, the pulsed current flowing through the switching key 11 decreases several times (in this case, three times). Such a decrease in the pulse current through the switch leads to an increase in its reliability. In addition, the installed power of the thyristor switch can be reduced. Energy losses in the key are also reduced. five 0 five 0 Invention Formula A device for pulsed feeding of the fields of an electrostatic precipitator containing controlled rectifiers according to the number of fields whose output wells are combined, a switching thyristor key whose cathode is connected to a common electrode and collecting electrodes of the fields of the electrostatic precipitator and the control electrode is connected to the output of the heater trigger pulses, and the choke is distinguished by the fact that, in order to increase reliability by reducing the pulse current of the switching thyristor key, a delay block, a com Utsii, as well as voltage sensors, control units and elements And - the number of fields, and the combined positive output bus controlled rectifiers through a choke connected to the anode of the switching thyristor key, the negative output bus rectifiers connected respectively to the corona electrodes of the electrostatic filter and the first input terminals of the voltage sensors, the second input terminals of which are connected to the common bus, and the outputs of the voltage sensors are connected to the first through the appropriate control units And, the second inputs of which are connected to the corresponding outputs of the switching unit, the input of the switching unit is connected to the output of the trigger pulse generator, and the control inputs of the controlled rectifiers are respectively connected