Washing apparatus for gaseous effluent containing solid and/or liquid impurities comprises flow wall allowing vertical flow of scrubbing liquid film towards narrower section of gas flow passage

摘要

A first flow wall (16) allows the vertical flow of a film of scrubbing liquid towards a narrower section (5) of the gas flow passage. There is at least one impact plate (13) and means of recovering (1, 10) the liquid impurities, the scrubbing liquid and the cake of solid impurities that forms on the impact plate. The impact plate is positioned so the gas is directed upwards. The first impact plate is curved so that the angle ( alpha ) between the tangent at the top (B) of the impact plate and the vertical is 0-50 deg . Alternatively the first impact plate is sloped at an angle ( beta ) of 20-70 deg to the horizontal. A second impact plate (14) is installed above the first. The second plate is similarly curved or sloped and is movable. The means of recovery include a recovery vessel (1,10) under at least the first flow wall and the first and second impact plates. The second impact plate is extended by a second flow wall (17) which has one end above the recovery vessel. The first flow wall acts with a regulating plate (11) controlling the size of the passage section (5). The device includes means of recycling the scrubbing liquid to the top of the first flow wall. These means of recycling include at least one trap at the top of the first flow wall. The first flow wall is a wall in a painting cabin and the device is lateral to it.