Non foaming two phase contactor

Claim 2

Apparatus for obtaining intimate contact and mass transfer between gas and liquid phases and subsequent separation of the phases having a reduced foaming tendency which comprises, means for supplying high velocity gas, conduit means having an entry location for receiving said high velocity gas and an exit location for releasing gas and liquid, means for supplying a liquid, means for introducing said liquid into said conduit for said high velocity gas resulting in annular mist flow within the conduit, wherein said conduit exit is flared so that its outlet cross section is greater than its cross section at said liquid introduction point whereby the fluid flow rate is reduced to within the froth flow range.

Claim 3

Apparatus for obtaining intimate contact and mass transfer between gas and liquid phases and subsequent separation of the phases having a reduced foaming tendency which comprises, means for supplying high velocity gas, conduit means having an entry location for receiving said high velocity gas and an exit location for releasing gas and liquid, means for supplying a liquid, means for introducing said liquid into said conduit for said high velocity gas resulting in annular mist flow within the conduit, wherein said conduit exit is flared so that its outlet cross section is greater than its cross section at said liquid introduction point whereby the fluid flow rate is reduced to within the froth flow range.

Claim 4

Apparatus for obtaining intimate contact and mass transfer between gas and liquid phases and subsequent separation of the phases having a reduced foaming tendency which comprises, means for supplying high velocity gas, conduit means having an entry location for receiving said high velocity gas and an exit location for releasing gas and liquid, means for supplying a liquid, means for introducing said liquid into said conduit for said high velocity gas resulting in annular mist flow within the conduit, wherein said conduit exit is flared so that its outlet cross section is greater than its cross section at said liquid introduction point whereby the fluid flow rate is reduced to within the froth flow range.

Claim 5

The apparatus of claim 1 wherein said conduit exit directs the liquid and gas flow downward into a container having a top cross section larger than said conduit outlet cross section and having an outlet for removing said liquid.

Claim 6

The apparatus of claim 1 wherein said conduit is of circular cross section and consists of a straight, vertical section, a bend of about 180* wherein the R/D ratio is greater than eight, and a downward exit section.

Claim 7

The apparatus of claim 1 wherein said flared conduit exit is of saw-toothed configuration.

Claim 8

Apparatus for black liquor oxidation comprising, a source of high velocity air, vertical conduit means, means for introducing said high velocity air into said conduit, means for introducing said black liquor into said air within said conduit producing annular mist flow, wherein said conduit means contains a bend of about 180* with a R/D ratio greater than 8 so that its exit is directed downward, said exit being flared to a cross section greater than the conduit cross section at said black liquor introduction point so that the fluid flow rate is reduced to froth flow, and wherein said flared exit directs said air and oxidized liquor into a container having a top cross section larger than said exit cross section and having an outlet for removing said oxidized liquor.

Claim 9

Apparatus for black liquor oxidation comprising, a source of high velocity air, vertical conduit means, means for introducing said high velocity air into said conduit, means for introducing said black liquor into said air within said conduit producing annular mist flow, wherein said conduit means contains a bend of about 180* with a R/D ratio greater than 8 so that its exit is directed downward, said exit being flared to a cross section greater than the conduit cross section at said black liquor introduction point so that the fluid flow rate is reduced to froth flow, and wherein said flared exit directs said air and oxidized liquor into a container having a top cross section larger than said exit cross section and having an outlet for removing said oxidized liquor.

Claim 10

The apparatus of claim 5 wherein said flared exit edge is of saw-tooth configuration.

Claim 11

The apparatus of claim 5 wherein said oxidized liquor is directed to a settling tank to allow removal of remaining gas.