초록 ▼

In order to efficiently mass transfer from gas, particularly air, into liquid or liquid suspensions with enhanced efficiency in terms of the mass of the gas transferred to the liquid, the gas is released or sparged through a plurality of open pipes which are disposed in a space between the bottom of

In order to efficiently mass transfer from gas, particularly air, into liquid or liquid suspensions with enhanced efficiency in terms of the mass of the gas transferred to the liquid, the gas is released or sparged through a plurality of open pipes which are disposed in a space between the bottom of the tank containing the liquid or liquid suspension and an axial flow impeller which creates a flow path downwardly past the outlet ends of the pipes. Turbulence is enhanced even though the air leaves the pipes at low velocity rather than in a jet through the use of a Bernoulli air trapping ring and plates. The ring and plates encounter the flow produced by the axial flow impeller successively. The ring distributes the air and assists in defining a low pressure region below the ring. A low pressure region also is defined by the plates on the underside thereof. The underside of the plates is in the vicinity of the outlets of the pipes. Distribution fins taper away from the outlet and provide for a spacial distribution of the low pressure gas. The low pressure air may exit the outlets of the pipes at a pressure of a few PSI greater than the liquid pressure at the outlets which may be in the range of 10% greater pressure than the liquid pressure at these outlets. The plates, especially at their edges, provide turbulence in the liquid flow to facilitate transfer of the mass of the gas to the liquid.

대표청구항 ▼

[ I claim:] [1.] Sparging apparatus which comprises an impeller for generating a discharge flow of liquid and a mechanism for releasing a fluid into the flow, the mechanism being disposed between the impeller and the bottom of a tank; the mechanism comprising at least one open pipe having an outlet

[ I claim:] [1.] Sparging apparatus which comprises an impeller for generating a discharge flow of liquid and a mechanism for releasing a fluid into the flow, the mechanism being disposed between the impeller and the bottom of a tank; the mechanism comprising at least one open pipe having an outlet through which said fluid is discharged at low pressure; fins disposed downstream of said outlet for distributing the fluid; and a plate for turbulizing the discharge flow as the discharge flow passes by said plate into the fluid released via said pipe, said plate being disposed above the outlet of the pipe and the fins.