SU1230693A1 - Apparatus for feeding electric precipitator - Google Patents

Description

This invention relates to electrical gas cleaning.

The aim of the invention is a higher degree of gas purification.

The drawing shows a diagram of the device for powering the electrostatic precipitator.

The electrostatic precipitator 1 with the parallel voltage divider 2 is connected to the rectifier 3 through a shunt 4. The rectifier input is connected to the secondary winding of the transformer 5. The electrostatic precipitator 1 is equipped with a dust sensor 6 installed at the output. The output of sensor 6 is connected to an extreme control unit (BEI) 7. A two-winding relay 8 is connected to the outputs of flip-flop 9, the counting input of which is connected to the output of circuit AND 10. The inputs of the latter are connected to the outputs of generator 11 and HE 12. The circuit input is NOT 12 connected of the output of the threshold element 13 and the input of the OR circuit 14. The input of the threshold device is connected to the second auxiliary rectifier 15 equipped with a filter 16. The input of the rectifier 15 is connected to the secondary winding of the transformer 17, the primary winding connected in parallel with the transformer a mater 5. A control unit 18 is connected to an input divider 2 and a shunt 4. The output of a control unit 18 is via contacts 19 and 20 of relay 8. It is connected to the control inputs of triacs 21 and 22, which allow the output voltage of the electrostatic filter to be varied. The output voltage levels of the triacs 21 and 22 can be changed by switching the line voltage transformer to the phase voltage and vice versa, or by switching from the three-phase mode to the single-phase one or by switching the transformer spurs (changing the transformation ratio).

The device works as follows.

The rectifier 3 supplies a constant voltage to the electrostatic precipitator 1, under the action of which the gas is cleaned from the plug. The magnitude of this voltage is automatically set by the control unit 18 at a level close to the breakdown level.

Depending on the position of the relay 8, made polarized, the control pulses from block 18 are fed to systistors 21 and 22. In the first approximation, the output voltage (average) is the same in both stages, but the level of voltage pulsations may differ 2-3 times.

Depending on the physical and physical properties of the gas, pulsations can improve or worsen the degree of gas purification. In this case, during the operation of an electrostatic precipitator, the properties of the gas may change. Block 7 perceives information about the degree of gas purification detected by the dust sensor 6. If the voltage on the transformer 5 is equal to or greater than the maximum voltage at the lower stage, then the threshold device 13 is turned on and this signal sets the trigger 9 and the relay coil through the OR 14 circuit to a position in which the transformer 5 is at a higher voltage step.

In the general case, the device operates in the search mode for the best degree of gas cleaning in terms of gas purification. In this case, there is no signal at the output of the threshold device 13, the signal at the output of the NOT 12 signal exists and periodically (after 10-30 minutes) the generator 11 sends a signal through the AND 10 circuit to the counting input of the trigger 9, causing it to switch. This leads nf to change the position of the relay 8, and hence the transformer stage 5. This same pulse arrives at the input of unit 7, which matches the readings of the dust sensor 6 at two transformer stages and, accordingly, generates a signal confirming or changing The current position of the relay is 8. This signal switches the relay to the previous state if, when switching the stage, the dustiness has increased, and maintains the position of the relay, if the dustiness has decreased.

Thus, the device periodically searches for a stage at which maximum gas cleaning is achieved.

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Compiled by V. Nagorny Editor N, Gorvat Tehred L. Serdyukova Proofreader A. Obruchar

2477/12

Circulation 514Subscribe

VNIIPI USSR State Committee

for inventions and discoveries 1.13035, Moscow, F-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

ELECTRIC FILTER POWER DEVICE, comprising a first transformer, to the secondary winding of which a first rectifier is connected, the terminals of which are connected through a shunt to a voltage divider, a triac transistor included in the primary winding of the first transformer, a control unit connected by inputs to the shunt and a voltage divider, distinguishing .- In order to increase the degree of gas purification, it is additionally equipped with a second triac, a second transformer, a dust sensor, an extreme control unit, polarized relay, trigger, second rectifier, filter, threshold element, generator, circuits NOT, AND, OR, while the second triac is connected to the output of the primary winding of the first transformer, the control inputs of the triacs through the inverse contacts of the relay are connected to the output of the control unit, the relay coils are connected to the inverse outputs of the trigger, the counting input of which is connected to the ^ output of the AND circuit, connected by the inputs to the generator and the NOT circuit, whose input is connected to the output of the threshold element and the first input of the OR circuit, to the second input of which The first output of the extreme control unit is connected, the output of the OR circuit and the second output of the extreme control unit are connected to the asynchronous inputs of the trigger, the outputs of the dust sensor and the 'And circuit are connected to the inputs of the extreme control unit, the input of the threshold element is connected to the filter connected to the output of the second rectifier, and the input of this rectifier is connected to the secondary winding of the second transformer, the primary winding of which is connected in parallel with the primary winding of the first transformer. * SU 1230693