Subarea power supply system and subarea power supply method for wet electric precipitator

Abstract

The invention provides a subarea power supply system and a subarea power supply method for a wet electric precipitator. The subarea power supply system for the wet electric precipitator comprises a plurality of electric field subareas, wherein each electric field subarea comprises a cathode hanger, a cathode frame, a cathode line, an anode beam and an anode plate. The system also comprises power supply sub-systems with the same number as the electric field subareas, wherein each power supply sub-system comprises a high-voltage power supply device, a low-voltage power supply device and an insulator box. Cathode structures between the electric field subareas are mutually separated from each other, and each electric field subarea is independently supplied by power. The subarea power supply method comprises the steps that: each electric field subarea is respectively and independently equipped with the high-voltage power supply device and the insulator box; the cathodes structures between different electric field subareas are mutually disconnected, and the safe distance is ensured, so that each subarea is independently discharged; the drying and insulation of high-voltage incoming lines is ensured by a continuous hot wind blowing mode. The subarea power supply system and the subarea power supply method provided by the invention have the advantages of effectively ensuring the safe and stable operation of the wet electric precipitator, effectively improving the dedusting efficiency, reducing the risk and reducing the high-voltage power supply load.

Description

Technical field [0001] The invention relates to the technical field of flue gas treatment methods, in particular to a partitioned power supply system and a partitioned power supply method for a wet electrostatic precipitator. Background technique [0002] my country's coal-based energy structure will not change for a long time. As the country continues to improve the exhaust dust emission standards of coal-fired boilers, the dust emission requirements have been greatly increased to 10mg / Nm 3 Even lower, while the SO carried in the flue gas after wet desulfurization 3 Aerosols and "gypsum rain" particles have also become new sources of pollution, and the need for deep dust removal technology is imminent. [0003] At present, common dry-type electrostatic precipitators, electric-bag compound precipitators and bag-type precipitators are used as front-end dust control technologies, which cannot effectively guarantee the ultra-clean emission of flue gas dust after the desulfurization de...

AI Technical Summary

Problems solved by technology

[0006] Usually, the wet electrostatic precipitator uses a high-voltage power supply device to supply high-voltage electricity to the entire dust removal electric field, and provides all the electric energy required for charging and collecting flue gas dust. Small and difficult to remove and other characteristics, the high-voltage power supply has a large load, and once the power supply fails, it will cause the entire electric field to be paralyzed and the wet electrostatic precipitator to stop operating

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