Patent ID: 7172412
Filing Date: 2007-02-06
Classification: C10G

Abstract:
1. A method of operating a pyrolysis heater for the pyrolysis of hydrocarbons in the production of olefins wherein said heater comprises: a. a radiant heating zone having a bottom hearth and opposing walls; b. at least one tubular heating coil for processing said hydrocarbons located in said radiant heating zone between said opposing walls; c. a plurality of hearth burners located on said hearth adjacent to each of said walls and directed upwardly for firing flame envelopes vertically up along said walls through said radiant heating zone; and d. a plurality of wall stabilizing fuel gas tips located on said walls above said hearth burners for injecting fuel gas upwardly between said walls and said flame envelopes; said method comprising the steps of firing said plurality of hearth burners with the combustion air and less than the stoichiometric amount of fuel gas and injecting additional fuel gas into said radiant heating zone through said wall stabilizing fuel gas tips to provide the stoichiometric quantity of fuels stage the combustion, and create a low pressure zone at said walls.