High-voltage and medium-frequency power supply for electrostatic dust collector and power supply method thereof

Abstract

The invention relates to a high-voltage and medium-frequency power supply for an electrostatic dust collector, which comprises a rectification unit, an inverter, a high-voltage rectification transformer and a controller, wherein the rectification unit is used for rectifying inputted three-phase 380V alternating current with a power frequency of 50Hz into direct current and then filtering and outputting the direct current; the inverter is used for inverting the filtered direct current to two-phase medium-frequency alternating current; the high-voltage rectification transformer is used for boosting and rectifying the two-phase medium-frequency alternating current and then supplying power to the electrostatic dust collector; and the controller is used for controlling the frequency of the medium-frequency alternating current inverted by the inverter. The high-voltage and medium-frequency power supply solves the technical problems of slow response time and low dust-collecting efficiency when the electrostatic dust collector in the prior art is in low-frequency (power-frequency), and the technical problems of high cost, immature process of high-power equipment and resource waste caused by replacing relevant equipment when the power supply is used for reforming the old dust collector when the electrostatic dust collector in the prior art is in high-frequency, and is a high-voltage and medium-frequency power supply for the electrostatic dust collector, which uses a medium-frequency power supply for supplying the power, improves response time and dust-collecting efficiency and has no need of replacing the equipment.

Description

technical field [0001] The invention relates to a power supply, in particular to a high-voltage intermediate-frequency power supply for an electrostatic precipitator and a control method thereof. Background technique [0002] Electrostatic precipitator (ESP for short) is a device that uses a strong electric field to charge dust particles, and separates and captures dust particles under the action of an electrostatic field. The working principle of the electrostatic precipitator is to use a high-voltage electric field to ionize the flue gas, generate a large number of electrons and ions, and move to the two poles under the action of the electric field force. During the movement, it encounters dust particles in the airflow to charge it. Under the action of the electric field force, the dust is separated from the airflow and moves towards the polar plate or polar line with the opposite polarity. When the charged dust reaches the polar plate or polar line, it is adsorbed on the ...

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is that the power supply of the electrostatic precipitator power input high-voltage rectifier transformer in the prior art is low frequency (power frequency) or high frequency, and there are problems of slow response time and low dust removal efficiency at low frequency, and high There is a problem of high cost and waste of resources caused by the need to replace the corresponding equipment when the frequency is high. Therefore, a high-voltage intermediate frequency electrostatic precipitator is proposed that uses an intermediate frequency power supply to supply power to the high-voltage rectifier transformer, improves the response time and dust removal efficiency, and does not need to replace equipment. power supply

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