Abstract: A method of regenerating a scrubbing solution containing sodium sulfite, sodium bisulfite, sodium sulfate and sometimes sodium hydroxide circulated in scrubbers to remove sulfur oxides from gas streams where sodium sulfite is converted to sodium bisulfite as sulfur dioxide is absorbed in the scrubbing solution. A portion of the circulating scrubbing solution is bled off for regeneration and reacted with calcium oxide in pebble lime while the pebble lime is impinged against an impingement surface at a velocity of at least 8-10 feet per second to convert the sodium bisulfite back to sodium sulfite and form calcium sulfite precipitate. The calcium sulfite is removed from the regenerated scrubbing solution and the regenerated scrubbing solution returned to the circulating scrubbing solution in the scrubbers.

Abstract: Gas scrubbing apparatus for removing sulfur dioxide from a gas stream with a cleaning liquid capable of absorbing the sulfur dioxide in the gas stream comprising a housing defining scrubbing chamber therein, a plurality of baffles in the scrubbing chamber at longitudinally spaced positions therealong for generating turbulence in the gas stream and rotating the gas stream about the central axis of the scrubbing chamber, spray means for spraying the cleaning liquid into the scrubbing chamber between the baffles to absorb the sulfur dioxide from the gas stream, and a mist eliminator downstream of the baffles to remove liquid droplets from the gas stream. The baffles are oriented so that each baffle rotates the gas stream approximately ninety degrees about the central axis of the scrubbing chamber as the gas stream flows thereby with all of the baffles rotating the gas stream in the same direction about said central axis.

Abstract: Apparatus is described for the continuous removal of particulate matter from a gas stream using a filter medium. In the improved apparatus of this invention particulate laden air passes through a filter medium depositing the particulate on the solid members of the medium. Wash liquid is used to flush the particulate matter off of and/or through the filter for collection. The improved apparatus comprises a cleanable filter medium carried on a previous support, liquid supply means for providing wash liquid to clean the filter medium, motive means to cause relative motion between the support (and filter medium carried thereon) and the liquid supply means such that the wash liquid can impinge on a given portion of the filter medium from different directions over a period of time, and means for collecting and removing medium. Essentially all the particle laden water which is entrained in the gas stream is separated by use of mist eliminators or similar devices.

Abstract: A filtration device and method for removing particulate matter entrained in a gas stream including a filter media with a first prescribed surface area on one side thereof; a perforated support for positioning the filter media so that one side thereof is in communication with the gas stream with the particulate matter entrained therein; a suction head defining a suction inlet therein with a second prescribed cross-sectional area smaller than the first prescribed surface area of the filter media on that side of said filter media opposite the side in communication with the gas stream; a fan for forcing the gas stream into the suction head through the filter media to separate the particulate matter from the gas stream; and drive means for moving the suction head along the filter media so that substantially all of the filter media is eventually used.

Abstract: A sampling device for removing particulate matter from a gaseous medium by jet impaction including a base, an impaction stage carried by the base and a connector diffuser carried by the impaction stage. The impaction stage has an apertured plate for generating a prescribed velocity of the gaseous medium as it passes therethrough, and a collection member is positioned under the apertured plate against which the gaseous medium impinges to collect the particulate matter thereon. Frangible locking means connect the jet impaction, the base stage and the connector diffuser together so that they cannot be separated without destruction of the locking means to prevent reuse.