Electrostatic precipitator with Coulomb lens anodes

Abstract

The invention relates to an electrostatic precipitator with Coulomb lens anodes, and the electrostatic precipitator may comprise a housing and at least one Coulomb lens electric field arranged in thehousing, wherein the Coulomb lens electric field is alternately arranged with a plurality of rows of cathodes and Coulomb lens anodes at intervals along the direction of smoke advance, the channels between two adjacent Coulomb lens anodes are flue gas flow channels, the coulomb lens anodes have a cavity with relatively closed periphery, and a dust hopper is connected to the lower end of the cavity. The dust in the flue gas channels is charged by gas ionization, and the charged dust is captured into the cavity under the Coulomb force of the electric field and is further condensed and sunk or vibrated and fallen into the dust hopper. The electrostatic precipitator with Coulomb lens anodes provided by the invention can realize the complete separation of air flow and dust flow, effectively avoids the secondary dust raise from vibration, greatly improves the dust removal efficiency, and continuously meets ultra-low emissions.

Description

technical field [0001] The invention belongs to the technical field of electrostatic dust removal, and in particular relates to an ultra-low-emission electrostatic dust collector with a Coulomb lens anode. Background technique [0002] High-voltage electrostatic precipitator is a device that collects dust in flue gas by electrostatic purification method. It has the advantages of high dust removal efficiency, low system resistance, reliability and durability, and is the most commonly used dust control technology among all dust removal technologies. A dust collector that uses the adsorption of charged dust by a high-voltage electric field to separate the dust from the dust-containing gas. That is, in the high-voltage electric field, the dust suspended in the dust-containing gas is charged by the ionization of the gas, and the charged dust moves to the electrode with the opposite polarity under the action of the Coulomb force of the electric field, and is adsorbed on the electr...

AI Technical Summary

Problems solved by technology

However, since the closed C480 anode plate is generally used in active electrostatic precipitators, the flue gas dust is adsorbed on the surface of the C480 anode plate after charging, and still resides in the flue gas channel, such as Figure 7 As shown in Fig. 1, when rapping to remove dust, the dust falling off from the surface of the electrode plate returns to the flue gas channel again, and is entrained by the air flow to escape to the electric field of the subsequent stage or the outlet of the electrostatic precipitator, generating secondary dust after rapping, resulting in instantaneous excessive emission, affecting Dust removal efficiency cannot meet the increasingly stringent new environmental protection requirements

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