Heater and method of operation

Details Heater and method of operation Heater and method of operation

2007-05-18

2010-10-26

McAllister, Steven B (Department: 3749)

Combustion

Process of combustion or burner operation

Flame shaping, or distributing components in combustion zone

C431S009000, C431S010000, C431S170000, C110S345000, C110S347000, C110S261000, C110S348000

Reexamination Certificate

active

07819656

ABSTRACT:
A furnace, firing pattern and method of operating a heater that employs a combination of hearth burners and wall burners for the cracking of hydrocarbons is described. The firing pattern leads to improvements in the uniformity of the coil metal temperatures and vertical heat flux profiles over the firebox elevation. The hearth burners operate with a stoichiometric excess of air while the wall burners operate with less than the stoichiometric amount of air.

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PCT/IB/326; International Preliminary Report on Patentability; Written Opinion of the International Searching Authority dated Nov. 24, 2009.
Translation of Examiner's First Report issued in corresponding Chilean application No. 1450-2008 (4 pages).

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