An apparatus for treating the exhausted smoked from a chimney by precipitation has a smoke collecting device placed at the exhaust of the chimney and a vapour injecting nozzle to spray high speed vapour over the smoke from the chimney into the collecting device. A water tank for receiving the mixture of the vapour and the smoke and precipitating the same with the water contained therein is connected to the collecting device by a conduit. The conduit is provided with suction means to accelerate the flow of the mixture of the vapour and the smoke to the tank. The water tank may also be equipped with set of vapour spraying devices and a smoke filtering web for preventing the possible leakage of smoke from the water tank. A preferred embodiment has two opposing collecting devices, each provided with its own conduit, suction means, and tank.
A pressure generator and gas scrubber includes a scroll casing having a gas discharge outlet and a plurality of liquid outlets; a hollow shaft extending through the casing for supplying water thereto; a plurality of radially-extending water feed tubes centrally positioned in the casing and secured to the hollow shaft in fluid communication therewith, each tube having an open outlet end at the free end thereof such that liquid supplied through the hollow shaft travels to the open outlet ends of the feed tubes and each tube having a constricted opening at the open outlet end thereof; a drive motor connected to the hollow shaft for rotating the hollow shaft and the plurality of feed tubes; and two gas inlet boxes positioned on opposite sides of the scroll casing in fluid communication with a central portion of the casing, for supplying a contaminated gas to be scrubbed to the casing adjacent the inlet ends of the feed tubes, such that water jets ejected from the open outlet ends of the feed tubes pull the gas adjacent the inlet ends into scrubbing contact with the water and create a positive pressure.
