Method and apparatus for blending and withdrawing solid particulate material from a vessel
US5104229A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Feb 1, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F25/821
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus is provided for blending solid particulate material in a vessel which includes a center lift column and a first downcomer channel which includes n successive vertical sections and n flow ports respective located at a top portion of the n sections. The n sections include withdrawal structure for providing a volumetric outlet flow rate which includes a flow rate contribution from each of the n sections which is 1/n of the outlet flow rate. The apparatus can also include a second channel which includes a plurality of vertically spaced inlets for receiving particulate material from different vertical locations within a blending vessel of the apparatus and an outlet for returning particulate material to the lower part of the vessel, with each of the inlets of the second channel including a baffle extending into an internal flow area of the channel. A discharge spout is connected to the outlet of the second channel and recycles a portion of the particulate material at the outlet to the power part of the vessel and withdraws another part of the particulate material at the outlet to a conveying line outside the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.