Cracking furnace with improved heat transfer to the fluid to be

Details Cracking furnace with improved heat transfer to the fluid to be Cracking furnace with improved heat transfer to the fluid to be

1988-01-13

1989-04-11

Favors, Edward G.

Liquid heaters and vaporizers

Water tube

Wall structure

122DIG13, 165177, 196110, 196116, 422201, F22B 1500

Patent

active

048195863

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.

REFERENCES:
patent: 3572999 (1971-03-01), Sato
patent: 3964873 (1976-06-01), Aramaki et al.
patent: 4160701 (1979-07-01), Dorner et al.
patent: 4466479 (1984-08-01), Maclean

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