Acidic gas removal using dry sorbent injection

摘要

A system and method for desulfurization or acidic gas removal from a hot flue gas is provided that uses a dry sorbent injection technology with downstream sorbent reproduction based on a dual-alkali process. As such, lime and flue gas carbon dioxide are used in a process to produce the dry sorbent, sodium bicarbonate.

主权项

1. A dry flue gas desulfurization system comprising:
an injector operable to inject a sorbent into a duct through which plant flue gas flows to a particulate collection device for flue gas acid gas removal by the sorbent; filters within the particulate collection device operable to collect spent sorbent from flue gas flowing therethrough; an alkali reactor operable for reaction of spent sorbent, lime, water and air to produce sodium hydroxide and gypsum; and a carbon dioxide absorber operable for reaction of sodium hydroxide with flue gas carbon dioxide to produce sorbent for injection.