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An exhaust gas scrubber including a tank of scrubbing liquid into which a downconer pipe(s) feeds inlet gas and fresh scrubbing liquid from a plenum. The inlet gas flows through slotted vortex generators forming file-scale bubbles encapsulated within a scrubbing liquid. The bubbles mix and coalesce

An exhaust gas scrubber including a tank of scrubbing liquid into which a downconer pipe(s) feeds inlet gas and fresh scrubbing liquid from a plenum. The inlet gas flows through slotted vortex generators forming file-scale bubbles encapsulated within a scrubbing liquid. The bubbles mix and coalesce in a turbulent motion, and are then passed through another set of vortex generators which break up coalesced bubbles and form fresh fine sized bubbles, and impart an angular velocity to the mixture. Formation and coalescence of the bubbles produce gas phase to liquid phase mixing and scrubbing. Centrifugal forces created through the slotted vortex generator produce liquid circulation and recycle. The bubbly mixture then rises, bubbles coalesce and break, and the liquid scrubbing solution falls back, flowing into a relatively quiescent down flow zone around the perimeter of the scrubber outside of an overflow weir or weirs. The outlet gas rises into a freeboard section where de-mister and heat exchanger pipes remove scrubbing vapour from the outlet gas. The scrubbing liquid flows downward into a quiescent settling tank where honeycomb vortex breakers inhibit turbulence to ensure settling of particulate into the sediment. Internal solids separation is accomplished in quiescent zones between the outer walls of the overflow dam(s) and the inner walls of the housing, and below the honeycomb vortex inhibitors. A conical bottom to the tank permits the settling sediment to be flushed out of the scrubber with the outlet scrubbing liquid. Scrubber solution so liquid level is controlled by a flow and level control valving arrangement. Scrubber solution temperature is controlled by a complementary arrangement of flow controls.

대표청구항 ▼

1. A scrubber for scrubbing gases, comprising:a scrubbing vessel for containing a bath of scrubbing liquid, said vessel having a reaction zone, and a quiescent zone; a conduit having defined therein an intake for receiving gases to be scrubbed; said conduit having a first wall and outlet porting def

1. A scrubber for scrubbing gases, comprising:a scrubbing vessel for containing a bath of scrubbing liquid, said vessel having a reaction zone, and a quiescent zone; a conduit having defined therein an intake for receiving gases to be scrubbed; said conduit having a first wall and outlet porting defined therein, said porting defined in said wall for immersion in a scrubbing medium, said conduit defining a passage through which gases can be transported from said intake to said outlet porting, said porting including a first array of slots defined in said first wall; said conduit being mounted to said vessel to present said porting in an immersed position relative to the scrubbing liquid in said reaction zone, whereby gases exiting said porting can mix with said scrubbing liquid in said reaction zone; a partition having said reaction zone lying to one side thereof, said partition being a second wall bounding a settling column, said partition having an upper edge over which scrubbing liquid can drain into said settling column and circulate back to said bath; a third wall intermediate said first wall and said second wall, said third wall having a second array of slots defined therein; when said conduit is immersed in said scrubbing medium, said porting being submerged and extending between a first depth and a second depth; a turbidity interrupter located between said quiescent zone and said reaction zone, said turbidity interrupter being a barrier having channels therein, said channels communicating between said quiescent zone and said reaction zone; and said slots of said first array of slots being separated from one another by fingers, said fingers encouraging formation of more than one stream of bubbles through said porting.