Apparatus and method for the gravity settling of suspended solids
US4263137A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Nov 19, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/2427
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method for improving the settling out of suspended solids in a liquor are described. A diffuser of a particular type is used to introduce a liquor containing a flocculant suspension into a sedimentation tank with low turbulence. The diffuser is so shaped that the liquor velocity can be reduced in a controlled manner. Liquid shear conditions are made so low inside the diffuser that excessive break-up of flocs does not occur. The diffuser has a flare angle and a discharge opening to throat dimensional ratio whereby these conditions of low turbulence and formation can be established. Several embodiments of sedimentation apparatus employing such diffuser are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.