High-frequency high-voltage high-power power supply for electrostatic dust removal

Abstract

The invention discloses a high-frequency high-voltage high-power power supply for electrostatic dust removal, which mainly comprises a three-phase power-frequency power supply, a rectification part, an inverter part, a resonant circuit, a high-frequency transformer, a high-voltage rectifier bridge, a load and a control module. The rectification part consists of a thyristor rectification module capable of rectifying the power-frequency electric energy output by the three-phase power supply into direct current, and a filter capacitor; the back of the rectification part is connected with the inverter part consisting of a high-frequency full-bridge Insulated Gate Bipolar Transistor (IGBT) inverter capable of inverting the direct current into high-frequency square wave; the resonant circuit consisting of a series inductor Lr, a series capacitor Cr and a parallel capacitor Cp and supplying power to the post-stage circuit in a resonant manner is connected behind the inverter part. By the invention, the deficiency of the conventional electrostatic dust removing power supply can be compensated, the dust removing effect is improved, and the utilization ratio of electric energy can be increased.

Description

A high-frequency high-voltage high-power power supply for electrostatic dust removal technical field The invention relates to a high-frequency, high-voltage, and high-power power supply for electrostatic dust removal equipment in various factories. Background technique The rapid development of modern industry has brought enormous pressure to the environment, and the problem of environmental protection has become increasingly prominent and has become the focus of people's attention. Exhaust gas discharged during industrial production contains a large amount of dust, which seriously affects air quality and is an important cause of air pollution. Therefore, the law stipulates that the exhaust gas of modern industrial enterprises must go through the dust removal step and can only be discharged after reaching the national standard. At present, dust removal generally adopts electrostatic dust removal method, and electrostatic precipitator has become an indispensable means of du...

AI Technical Summary

Problems solved by technology

Traditional high-voltage DC power supplies mostly use thyristor phase-controlled rectification for power supply. This method first makes the three-phase power frequency through the thyristor voltage regulation, and then three-phase rectification after the transformer boosts the voltage. This method has the advantages of simple structure, large capacity, The control technology is mature, but the disadvantages are low conversion efficiency, large volume, heavy weight, high cost, slow dynamic response speed, and large output ripple

The dust removal effect alone is difficult to fully meet the emission limit of the new standard. In order to adapt to the new emission standard, the electrostatic dust removal equipment must be updated. Many factories combine bag dust removal to improve it. This method is costly and will cause secondary pollution

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