In the flue gas duct, the SO3 is condensed immediately at the dosing point and reacts with the fly ash particles, resulting in a lower fly ash resistivity of these particles.
Ash particles with lower resistivity have a higher migration velocity and are collected on the dust collector plates. The dust layer adhering to the collector plate is not working as an insulator anymore, allowing the current of the ESP to work in the electric field instead of heating up the dust layer on the plate.
The obvious effect is a very high efficiency of the ESP and easy removal of the dust from the plates. In fact, after a few days of operation, the ESP will be cleaned by the SO3 and after rapping the bare metal is visible. Cycles between rapping of the plates can be extended for lower emissions and reduced stress of the ESP.
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