High-power DC superimposed pulse power source

Abstract

The invention relates to a high-power DC superimposed pulse power source, which comprises a high-frequency high-voltage DC power source and a high-voltage pulse power source connected to each other through an inductor L2, wherein the high-voltage output end of the superimposed power source is connected with a dust collector; the high-voltage pulse power source comprises a first rectifier bridge, an IGBT1, a first resonant capacitor C1, and a pulse transformer T2 connected in sequence; the AC input end of the first rectifier bridge is connected to the power frequency AC power source; the DC positive output end of the first rectifier bridge is connected to the drain of the IGBT1; the DC negative output end of the first rectifier bridge is connected to the source of the IGBT1; the drain of the IGBT1 is connected to one end of the first resonant capacitor C1; the other end of the first resonant capacitor C1 and the source of the IGBT1 are connected to two ends of a primary winding of the pulse transformer T2; and one end of the secondary winding of the pulse transformer T2 is connected with a DC blocking capacitor C5, and the other end is grounded. High-efficiency dust removing effectsare achieved, and remarkable dust removal effects are achieved especially for high specific resistance dust and ultra fine dust.

Description

technical field [0001] The invention relates to the field of high-voltage dust removal power supplies, in particular to a high-power DC superimposed pulse power supply. Background technique [0002] With the advancement of the country's deep control of air pollution, environmental protection requirements are becoming more and more stringent, requiring all steel plants and cement plants to achieve ultra-low emission effects. But actually, for the sintering head and cement kiln head of the steel plant, due to the characteristics of high dust specific resistance and fluctuating flue gas conditions, it is easy to produce back corona phenomenon in the dust collector, which leads to the abnormal power supply of conventional electric dust collectors. Work, dust removal effect is very poor. Especially ultra-fine dust is difficult to be captured in the dust collector, and it needs to generate a high concentration of charge groups in an instant to capture these ultra-fine dust. [0...

AI Technical Summary

Problems solved by technology

[0003] The existing dust collector power supply has experienced two generations of product development from industrial frequency power supply to high frequency power supply, and the dust removal efficiency has been significantly improved. However, neither the industrial frequency power supply nor the high frequency power supply can solve the problem of back electricity generated by the high specific resistance of the flue gas. The problem of corona, the reverse corona phenomenon will lead to a significant reduction in dust removal efficiency

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