Method and Device for Treating Gas By Injecting a Powdered Compound and an Aqueous Phase

摘要

The invention relates to a method for treating a gas comprising the following steps: injecting a powdered compound into the gas line, injecting an aqueous phase in droplet form into said line, capturing pollutants from the gases, and recovering said powdered compound separately. The step for injecting an aqueous phase in droplet form is done so as to moisten those particles of powdered compound in the gas line, when they are injected.

主权项

1. A method for treating gas having a predetermined flow direction in a gas conduit comprising the steps of
a) injecting a powdery compound into the gas conduit at an injection point of a powdery compound, with formation of a cloud or flow of particles of powdery compound in said gas conduit, b) injecting an aqueous phase as droplets into said gas conduit, c) capturing pollutants of the gases with said powdery compound, and d) separately recovering said powdery compound enriched in pollutants and the gases depleted in pollutants,
characterized in that said step for injecting an aqueous phase as droplets is carried out inside said gas conduit in the injected cloud or flow of powdery compound particles, so as to humidify these powdery compound particles inside the gas conduit, during their injection, according to a weight ratio between the aqueous phase injected as droplets and the injected powdery compound of greater than or equal to 0.05 and less than or equal to 1.2.