A flue gas dedusting system and its electric precipitator

Abstract

The invention discloses a flue gas electric dust remover. The flue gas electric dust remover comprises an inlet flue gas box, an outlet flue gas box, a high-pressure electrostatic dust collection electric field positioned between the inlet flue gas box and the outlet flue gas box, and a heat exchange device arranged in the inlet flue gas box. The flue gas electric dust remover can reduce the temperature of flue gas before the flue gas enters the high-pressure electrostatic dust collection electric field, so the volume flow rate of the flue gas to be treated which enters the electric field is reduced, and the flow velocity of the flue gas in a flue gas channel of the electric field is correspondingly reduced; meanwhile, the flue gas temperature is reduced, so the dust specific resistance of the flue gas is reduced, and the dust removal efficiency of the electric dust remover is improved; in addition, the heat exchange device is arranged at the inlet flue gas box, so the inner space of the inlet flue gas box on the conventional electric dust remover can be fully utilized, and additional occupied space is not increased while the dust removal efficiency is improved, namely the flue gas electric dust remover has the advantages of compact structure and contribution to system and process arrangement. The invention also discloses a flue gas dust removal system with the flue gas electric dust remover.

Description

technical field [0001] The invention relates to the technical field of dust removal, in particular to a flue gas electric dust collector. The present invention also relates to a flue gas dust removal system comprising the above flue gas electric dust collector. Background technique [0002] Electrostatic precipitator technology has been widely used in the field of environmental protection, for example, the smoke and dust control industry of coal-fired thermal power units. The electrostatic precipitator is the commonly used flue gas purification equipment. [0003] The electrostatic precipitator has a high-voltage electrostatic dust collection electric field, a smoke inlet, and a smoke outlet. The high-voltage electrostatic dust collection electric field is located between the smoke inlet and the smoke outlet. Electrodes are arranged in the high-voltage electrostatic dust collection electric field. The working principle of its dust removal is: when the dust particles in the...

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Problems solved by technology

[0004] However, the electrostatic precipitator in the prior art has the following technical problems: the temperature of the flue gas entering the smoke inlet is usually high, resulting in a high dust specific resistance of the flue gas entering the high-voltage electrostatic precipitator electric field, which reduces the efficiency of electrostatic precipitator , unable to meet the gradually increasing environmental protection requirements

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