Patent ID: 7985281
Filing Date: 2011-07-26
Classification: B01D

Abstract:
1. In a device for separating gaseous pollutants from a gas through the use of an absorption liquid, said device comprising a) an inlet for receiving a gas containing at least one gaseous pollutant and an outlet for discharging the gas from said device after the at least one gaseous pollutant has been separated from the gas, b) an essentially horizontal apertured plate having an upper surface and an edge and being mounted between the inlet and the outlet of said device so as to be arranged to permit passage of the gas containing the at least one gaseous pollutant from below the essentially horizontal apertured plate and so as to enable a layer of the absorption liquid to flow along the upper surface of the essentially horizontal apertured plate, c) an inlet zone in which the absorption liquid is distributed over the essentially horizontal apertured plate to thereby create the flowing layer of the absorption liquid on the upper surface of the essentially horizontal apertured plate, and d) an outlet zone in which the flowing layer of the absorption liquid is received after the flowing layer of the absorption liquid has flowed over the upper surface of the essentially horizontal apertured plate, the improvement comprising: e) a fixed barrier located at the outlet zone having an upper edge and positioned within the outlet zone so as to extend vertically upwards from the essentially horizontal apertured plate, and f) a controllable throttle means positioned above the fixed barrier so opening of a throttle plate results in a clap being formed between the upper edge of the fixed barrier and the throttle plate, and operative to control the amount of resistance that the flowing layer of the absorption liquid is required to overcome in order to flow past the fixed barrier into the outlet zone.