Patent ID: 8137649
Filing Date: 2012-03-20
Classification: B01D

Abstract:
1. A method for removing gaseous pollutants from a gas, the method comprising: (a) flowing a gas stream comprising gaseous pollutants into a horizontally disposed housing via a waste gas inlet, the horizontally disposed housing comprising the waste gas inlet at one end, a treated gas outlet at an opposite end, a liquid inlet manifold proximal the waste gas inlet and a demister proximal the treated gas outlet, wherein the horizontally disposed housing is substantially free of flow deflection members between the liquid inlet manifold and the demister, thereby defining a substantially unrestricted gas-liquid contacting zone between the liquid inlet manifold and the demister; (b) passing the gas stream through the substantially unrestricted gas-liquid contacting zone; (c) spraying, concomitant to the passing step, a scrubbing liquor through the substantially unrestricted gas-liquid contacting zone and co-current to the flow of the gas stream, thereby contacting the gas stream with the scrubbing liquor; (d) removing at least some of the gaseous pollutants from the gas stream during the contacting; (e) operating, during the flowing, passing, spraying and removing steps, the horizontal duct scrubbing system at an L/G ratio of less than 20.