Impeller system for mixing and enhanced-flow pumping of liquids
US5501523A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1995 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Apr 26, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F27/8111
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A rotatably driveable enhanced-flow impeller system has a radial flow impeller with a first impeller face disposed proximate the bottom of the tank and proximate or extending into an inlet port for liquids in the tank bottom. The radial flow impeller has a plurality of blades with radially outermost blade tips terminating along a blade terminating circle. The blades and inlet port are contoured to reduce shear stress on the liquids. Disposed adjacent a second opposing face of the radial flow impeller is a radial flow extension plate which preferably extends radially outwardly along the second face by a radial distance beyond the blade terminating circle. The radial flow extension plate may be fixedly attached to the second impeller face. The enhanced-flow impeller system can be used advantageously to form efficiently and with enhanced effectiveness a liquid - liquid dispersion as droplets of at least one liquid in at least one other immiscible liquid and to distribute the dispersion uniformly through the tank volume during a dispersion residence time in the tank, while avoiding, because of minimization of shear stress on the liquids, the formation of fine (smaller) of droplets of o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.