Enhanced Fly Ash Collection

摘要

A process of enhancing fly ash collection without adding SO3 to a flue gas can include providing a flue gas that includes fly ash and combustion gases from a coal fired boiler; injecting into the flue gas a particulate resistivity aid; and then collecting the fly ash and particulate resistivity aid with a cold side electrostatic precipitator (ESP).

主权项

1. A process of enhancing fly ash collection comprising:
providing a flue gas that includes fly ash, which has a native fly ash resistivity, and combustion gases from a coal fired boiler; adding into the flue gas a particulate resistivity aid that consists essentially of a particulate support carrying a resistivity agent; reducing the native fly ash resistivity to an admixture resistivity; and then collecting an admixture of the fly ash and particulate resistivity aid with a cold side electrostatic precipitator (ESP); wherein a collected mass fraction of fly ash is increased without the addition of SO3.