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:
Apr. 11, 1989
Filed:
Jan. 13, 1988
Applicant:
Inventor:
Walter Kreuter, Penzberg, DE;
Assignee:
Linde Aktiengesellschaft, Wiesbaden, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F22B / ;
U.S. Cl.
CPC ...
1222 / ; 122D / ; 165177 ; 196110 ; 196116 ; 422201 ;
Abstract
A cracking furnace for naphtha and other hydrocarbons or, in general, for the rapid heating of a fluid feed stack has one or more tubular elements satisfying the following conditions: d.sub.h 32 F/U.ltoreq.40mm, and D/d.gtoreq.2, wherein: d.sub.h =the hydraulic diameter of the flow passage defined as the ratio of the flow cross-sectional area to the inner peripheral dimension therearound; F=the flow cross-sectional area; U=the inner peripheral dimension of the flow cross section; d=the cross-sectional height of the flow cross section; and D=the width of the flow cross section.