Method and apparatus for the purification of waste gas of a...

Details Method and apparatus for the purification of waste gas of a... Method and apparatus for the purification of waste gas of a...

B - Operations, Transporting

01

D

B01D 53/84 (2006.01) B01D 47/00 (2006.01) B01D 47/10 (2006.01) B01D 53/75 (2006.01)

Patent

CA 2271546

The exhaust gas enters via an exhaust gas line (1) into a washing apparatus (2). In the washing apparatus (2) solid matter particles are predominantly separated. The pre-washed exhaust gas flows from the washing apparatus (2) through a droplet removing conduit (10) to a trickling filter device (11) in order to be subjected to an activated sludge treatment for the separating of gaseous contaminants. In order to reduce the point of condensation and accordingly the absolute humidity of the exhaust gas for the activated sludge treatment either fresh air is added through a feed line to the pre-washed exhaust gas or the washing water which is led in a closed circuit through the washing water line (5) of the washing apparatus (2) is cooled in a heat exchanger (26) in a cooling tower. A portion of the washing water of the washing apparatus (2) is led through a first solid matter removing apparatus (7) of which a portion of the filtrate is led to an activated sludge basin (13) located under the trickling filter device (11). A portion of the water of the activated sludge basin coming from the trickling filter device (11) is led to a second solid matter removing apparatus (17), of which a portion of the filtrate is led in a counter-move to the washing water of the washing apparatus (2).

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