Patent · US Expired

Process for removing relatively coarse-grained solids from a stationary fluidized bed

US6688474B1 · kind B1 · utility

0Cited by

7References

2Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Martin Hirsch · Friedrichsdorf, DE
Andreas Orth · Friedrichsdorf, DE
Peter Weber · Delmar, US

Key dates

Filing date	Nov 13, 2000
Grant date	Feb 10, 2004
Priority date	—
Expiry date	Nov 13, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J8/1872
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

According to the invention, a fluidizing gas is introduced upwards into the fluidized bed (3) through a valve grid (2), said stationary fluidized bed (3) containing solids with different grain sizes. A supply pipe (10) is disposed in the area of the fluidized bed, the mouth of said pipe being located above the valve grid (2) and its outlet (12) leading outwards from the fluidized bed (3). Part of the solids located above the valve grid (2) is blown into the supply pipe by a gas jet (13) which is directed upwards and fed separately from the fluidizing gas and pneumatically evacuated from the fluidized bed through the supply pipe (10). Normally, the flow speed of the gas in the supply pipe is at least two times higher than the speed of the fluidizing gas in the fluidized bed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.