Mixer sparging apparatus
US5925293A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F27/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.