Patent · US Expired

Method of discharging light-weight substances by abrupt change of rotational speed of a screw conveyor centrifuge component

US5474515A · kind A · utility

3Cited by

2References

7Claims

0Family size

Assignee

Klockner-Humboldt-Deutz AG · DE

Inventors

Wolfgang Epper · Bergheim, DE
Reinhold Schilp · Herrsching am Ammersee, DE

Key dates

Filing date	Jun 28, 1994
Grant date	Dec 12, 1995
Priority date	—
Expiry date	Jun 28, 2014

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB04B1/2016
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

When a screw-conveyor centrifuge is turned off and its rotation speed diminishes to the point where the centrifugal force is smaller than the force of gravitation, the liquid ring formed inside the centrifuge bowl under the centrifugal force collapses, and a detrimental discharge of liquid takes place at the solids discharge of the centrifuge. In accordance with the method of this invention, the rotation speed of the centrifuge bowl (2) and/or of the screw conveyor (4) is briefly abruptly changed immediately before this critical rotation speed is reached, so that the liquid ring is caused to spiral toward the liquid discharge openings (5) at the other end of the centrifuge (1) by the screw helices (3) of the screw conveyor (4).

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