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:
Jan. 18, 1994
Filed:
Feb. 05, 1993
Applicant:
Inventors:
Max-Alix Cameau, Cleveland Heights, OH (US);
Alfred Schultz, Mentor, OH (US);
Lemuel E Dolan, Lawrenceville, GA (US);
Assignee:
Elsag International B.V., Amsterdam Zuidoost, NL;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F22G / ;
U.S. Cl.
CPC ...
122480 ; 1224481 ; 122460 ; 364550 ; 236 14 ;
Abstract
The firing rate and the feedwater flow rate of a universal pressure boiler are controlled using a cascaded steam temperature control system. The secondary superheater outlet temperature comprises an outer loop for the control system, while the convection pass outlet temperature comprises an inner loop for the control system. Control variables for the system include the secondary superheater outlet temperature, the convection pass outlet temperature and the difference between the primary superheater outlet temperature and the secondary superheater inlet temperature.