Power supply redundancy system of high-temperature dust removal and denitration system, operation method of power supply redundancy system, and method for maintaining and detecting high-voltage electric field by using power supply redundancy system

Abstract

The invention provides a power supply redundancy system of a high-temperature dust removal and denitration system, an operation method of the power supply redundancy system, and a method for maintaining and detecting a high-voltage electric field by using the power supply redundancy system, belonging to the technical field of dust removal of flue gas. The invention aims to overcome the problem that the reliability of a high-temperature dust removal and denitration system is influenced after a high-voltage power supply of a high-temperature dust remover fails in the prior art. The system comprises a preheater, a flue gas modulation system, a high-temperature dust remover and an SCR denitration system, wherein the preheater, the flue gas modulation system, the high-temperature dust remover and the SCR denitration system are sequentially connected through pipelines; the high-temperature dust remover comprises a first high-voltage electric field and a second high-voltage electric field; the first high-voltage power supply supplies power to the first high-voltage electric field through a first high-voltage switching device; the second high-voltage power supply supplies power to the second high-voltage electric field through a second high-voltage switching device; and a high-voltage communication device for electrically connecting the first high-voltage switching device and the second high-voltage switching device is arranged between the first high-voltage switching device and the second high-voltage switching device.

Description

technical field [0001] The invention belongs to the technical field of flue gas dedusting, and in particular relates to a redundant power supply system and an operation method of a high-temperature dedusting and denitrification system and a method for using it to maintain and detect a high-voltage electric field. Background technique [0002] The existing cement kiln production process will produce a large amount of dust, nitrogen oxides, etc., especially the tail gas discharged from the kiln tail. The temperature of the flue gas is generally 320°C to 350°C, and the dust concentration is generally 80g / Nm 3 ~100g / Nm 3 , the concentration of nitrogen oxides is generally 700mg / Nm 3 ~800mg / Nm 3 . Cement kiln nitrogen oxides must achieve ultra-low emissions, meeting the requirements of ultra-low emissions of nitrogen oxides less than 50mg / Nm 3 The combination of high temperature dust collector and selective catalytic reduction (SCR) denitrification system is a very good ultra...

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Problems solved by technology

[0003] Aiming at the problem in the prior art that the high-voltage power supply of the high-temperature dust collector fails and affects the reliability of the high-temperature dust removal and denitrification system, the present invention provides a redundant power supply system and operation method of the high-temperature dust removal and denitrification system and uses it to maintain the high-voltage electric field detection method

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