Abstract A treatment plant for polluted air or gas includes a water tank having a vertical inlet conduit communicating with the upper end of the tank. The tank is divided into upper and lower water chambers by a transverse filter assembly. In the inlet conduit, the gas is wetted from a spray nozzle and then directed through filtering elements to remove solid particles prior to being discharged into a lower chamber of the water tank. The gas is further purified in passing through the water, in the lower and upper water chambers, and through the filter submerged assembly. The gas to be treated may be received from building enclosures, or may be received from intake stacks collecting polluted air from particularly contaminated outside areas such as city streets.
Apparatus as set forth in claim 1 including separate pipe means communicating the lower end of said filter assembly perforated pipe with the liquid chamber of said tank to discharge the spray water flowing through said perforated pipe at the bottom of said tank; and pump means associated with said tank, including a suction line communicating with said tank adjacent to the bottom thereof, and a discharge line for supplying water to said water spray means.
Claim 2
Dependent Claim
77 words
Apparatus as set forth in claim 1 including a second filter assembly mounted in said tank to be submerged in the water in said liquid chamber; said filter assembly defining a horizontal wall separating said liquid chamber into upper and lower portions; said inlet conduit extending through said filter assembly to the lower liquid chamber, whereby gases emerging from said conduit flow upward through the lower liquid chamber, said submerged filter assembly, and said upper liquid chamber.
Claim 3
Dependent Claim
26 words
Apparatus as set forth in claim 3 wherein said second filter assembly comprises spaced parallel perforated plates enclosing a layer of fibrous or granular filtering material.
Claim 4
Dependent Claim
44 words
Apparatus as set forth in claim 1 wherein said water tank is a closed tank; means to maintain the liquid level in said tank to define a gas chamber at the top thereof; and a gas discharge conduit communicating with the tank gas chamber.
Claim 5
Independent Claim
88 words
A method for treating exhaust gases to remove impurities therefrom including the steps: passing the gas through a passageway above and terminating in a body of water, said passageway defined by an annular filter body and a central perforated open passage; contacting the gas at the upstream end of said passageway with a volume of spray water sufficient to substantially fill said central passage whereby the gas is caused to pass through the filter body; and flowing the gas emerging from said passageway through said body of water.
Claim 6
Dependent Claim
25 words
A method as set forth in claim 6 including the step: passing said gas through a mechanical filter unit submerged in said body of water.