IP Library › Granted Patent US 12704257
Granted Patent B2
US 12704257 · App. 18/222,755 · Granted Aug 11, 2026

Furnace for implementing an endothermic process

Inventor: Diana Tudorache (Bures sur Yvette, FR)
Assignee: L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude
F23M9/06B01J19/2415B01J2219/00157F23D23/00F23D99/004
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Quick Facts
Patent No.
US 12704257
App. No.
18/222,755
Granted
Aug 11, 2026
Kind
B2
Abstract

A furnace for implementing an endothermic process, including a combustion chamber delimited by a wall, at least one tubular reactor positioned in the combustion chamber, at least one burner arranged in the combustion chamber configured to supply the tubular reactor with the heat required for the endothermic process, with the burner including at least one nozzle for discharging a flame, the nozzle being oriented along an axis of the nozzle. Wherein the chamber has, over at least part of an inner surface of the wall, a convex inner profile curved in a direction of the axis of the nozzle, the profile being adjacent to the burner and facing the axis.

Claims (22)

1 . A furnace for implementing an endothermic process, comprising:

a combustion chamber delimited by a wall,

at least one tubular reactor positioned in the combustion chamber,

at least one burner arranged in the combustion chamber configured to supply the tubular reactor with the heat required for the endothermic process,

the burner comprising at least one nozzle for discharging a flame, the nozzle being oriented along an axis of the combustion chamber,

wherein the chamber has, over at least part of an inner surface of the wall, a convex inner profile curved in a direction of the axis of the nozzle, the profile being adjacent to said burner and facing the axis,

wherein the convex inner profile protrudes over the inner surface of the wall, and

wherein the inner profile extends over a length L along a tangent to the inner profile, parallel to the axis of the nozzle, starting from a point of the tangent touching the inner profile, the inner profile having, inside the chamber, a thickness R, a ratio R/L being less than 1.1.

2 . The furnace according to claim 1 , wherein:

the axis of the nozzle is not secant with the inner profile,

a distance between a tangent to the inner profile, parallel to the axis of the nozzle, and the axis of the nozzle is a distance P,

an inner dimension of the nozzle at the discharge end of said nozzle, in a direction in which the distance P is measured, is a dimension D,

and a ratio P/D is between 0 and 2.

3 . The furnace according to claim 1 , wherein:

the axis of the nozzle is secant with the inner profile,

a distance between a tangent to the inner profile, parallel to the axis of the nozzle, and the axis of the nozzle is a distance P,

an inner dimension of the nozzle at the discharge end of said nozzle, in a direction in which the distance P is measured, is a dimension D,

and a ratio P/D is between 0 and 0.5.

4 . The furnace according to claim 1 , wherein:

a distance measured along the axis of the nozzle, between that point of the tangent which touches the inner profile and a top of the nozzle, is a distance H,

a distance I measured along the axis of the nozzle, between a top of the nozzle and an inner surface of the wall furthest away from the top of the nozzle, is a distance I,

a ratio H/I being less than 1/2.