Control method and system of zero-spark high-pressure electrostatic precipitation power-supply

Abstract

The invention relates to a control method and a control system of zero-spark high-voltage electrostatic dedusting power supply, the system comprises an additional detecting electrode, a spark voltage generating circuit unit, a high-voltage measuring circuit and a microcomputer control unit. Through an additional electrode device that is arranged in a flue gas passage, the detecting electrode is connected with a detecting voltage generating circuit, disruptive critical voltage of the additional electrode is detected, and the critical disruptive voltage of a dedusting electric field is computedby a linear relation. The control method and system of the disruptive critical voltage detection of flue gas medium are characterized by simple structure, quick response speed, zero-spark in the dedusting electric field, and the like.

Description

technical field [0001] The present invention relates to a control method and system for high-voltage electrostatic precipitator power supply, in particular to a control method and system for zero-spark high-voltage electrostatic precipitator power supply, specifically a method for automatically detecting the critical breakdown voltage of the flue gas medium by adding additional sampling electrodes, and The dust removal electric field voltage can be adjusted in real time according to the detection results, and has the characteristics of simple structure, fast response speed, and no spark in the dust removal electric field. Background technique [0002] The basic principle of high-voltage electrostatic precipitator is: the high-voltage electrostatic precipitator is composed of two corona electrodes and dust-collecting electrodes with opposite polarities. When working, a DC high voltage is applied between the corona electrode and the dust collecting electrode to cause corona di...

AI Technical Summary

Problems solved by technology

The spark tracking control has the following problems: (1) Due to the existence of sparks in the dust removal electric field, the dust removal efficiency is greatly reduced when the sparks appear, resulting in a decrease in the total dust removal efficiency;

[0007] (2) Due to the existence of sparks in the dust removal electric field, certain damages are caused to the electrodes;

[0008] (3) In order to increase the tracking speed of the dust removal voltage, the spark rate must be increased, but increasing the spark rate will cause a decrease in the dust removal efficiency and damage to the electrodes, so a contradiction arises;

[0009] (4) When the flue gas composition, concentration, humidity, temperature and other parameters change, the dust removal voltage cannot be adjusted quickly

This kind of control has the following problems: Since the changes in the flue gas composition, concentration, humidity, temperature and other parameters will cause the change of the dielectric breakdown voltage, so only the detection of the flue gas inlet temperature cannot obtain the accurate optimal setting value of the dust removal voltage

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