C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/19
C02F 3/12 (2006.01) B01F 3/04 (2006.01) B01F 5/12 (2006.01) C02F 3/20 (2006.01)
Patent
CA 1121074
A B S T R A C T In an apparatus for mixing gases with and dissolving gases in bodies of liquid there is an axial-flow pump impeller 26, which is arranged to raise the liquid through a substantially vertical riser line 13 whose lower end exhibits an inlet 15 for the liquid and whose upper end forms an outlet 11 for the pumped liquid and is defined by guide surfaces 7 arranged to deflect the liquid radially from the axis of the riser line 13, the drive shaft 4 of the impeller extending coaxially with the riser line from a drive unit, located above the said body of liquid, to the impeller 26, the improvement in which the drive shaft 4 is enclosed by a stationary line 16 whose inner wall together with the drive shaft 4 defines a gas-communication passage 17 whose lower end discharges into the riser line 13 via at least one outflow passage 19 directed substantially radially to the gas flow, said gas-communication passage open- ly communicating with a gas source, such as the surrounding atmosphere, as illustrated in Figure 1.
324688
Gowling Lafleur Henderson Llp
Sala International Ab
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