The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2012
Filed:
Jan. 03, 2012
Lars Ledung, Vasteras, SE;
Erik Dahlqvist, Vasteras, SE;
Lars Ledung, Vasteras, SE;
Erik Dahlqvist, Vasteras, SE;
ABB AB, , SE;
Abstract
A method and a device for controlling a process for burning lime containing mixture (CaCO) and converting it to calcinated lime (CaO) in a rotary kiln, the rotary kiln having an elongated cavity surrounded by a wall and a burner arranged to heat the cavity. The method includes collecting measurement data of the temperature in the wall at a plurality of measuring points along the longitudinal axis of the cavity, predicting the actual temperature gradient along the longitudinal axis of the cavity based at least on the measurement data of the temperature in the wall, and by means of a thermal model describing the temperature along the cavity of the kiln, determining a desired temperature gradient along the cavity based on the predicted temperature gradient along the cavity and a predetermined control strategy controlling the temperature in the kiln.