Patent · US Expired

Method of controlling a rotary kiln during start-up

US4910684A · kind A · utility

19Cited by

4References

1Claims

0Family size

Assignee

F. L. Smidth & Co. A/B · DK

Inventors

Jens Ostergaard · Avenue Madeleine, DK
Klaus Gadeberg · Copenhagen, DK

Key dates

Filing date	Aug 5, 1988
Grant date	Mar 20, 1990
Priority date	—
Expiry date	Aug 5, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S706/906
WIPO fieldControl
WIPO sectorInstruments

Abstract

To facilitate a smooth and quick start-up of a rotary kiln, a Fuzzy Logic Control system is proposed, the principal feature of which is to mandate control actions to decrease the specific heat consumption along a straight line from an initial high value to a steady-state value established for the kiln, and then to switch over to an existing steady-state fuzzy logic control mode. In the start-up phase, further process variables are preferably measured and monitored against reference values to mandate concurrent control actions influencing the Fuzzy Logic Control system in a weighted manner.

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