LOW NOx BURNER FOR ETHYLENE CRACKING FURNACES AND OTHER HEATING APPLICATIONS

a technology of nox burner and ethylene cracking furnace, which is applied in the direction of lighting and heating apparatus, combustion types, and combustion using lump and pulverulent fuel, etc., can solve the problems of sub>x /sub>emission, and achieve the effect of low nox generation and high nox emissions

US20150133709A1Inactive Publication Date: 2015-05-14HONEYWELL INT INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2015-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A burner assembly for and method of producing ethylene having a mechanism to inject either primary fuel, staged fuel, or both by premix methods before combustion in a furnace. The burner assembly has at least one premix injection assembly for either exclusively primary fuel or exclusively staged fuel injection paired with a nozzle mix injection or injection means for primary and staged fuel both by premix methods. The primary fuel premix assembly associates with a burner tile that consists of multiple inlets and outlets connected by venturi channels to direct and combine combustion air and staged fuel coming from staged fuel orifice spuds. Primary fuel and combustion air are mixed in a premix assembly and directed inside the furnace, and above the burner tile to complete the reaction with the staged fuel and combustion air mixture in a combustion zone inside of the furnace.
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Description

1. FIELD OF THE INVENTION

[0001] This invention relates generally to a burner assembly for use in a furnace. More specifically, the invention relates to a burner assembly for improved, ultra-low NOx burner performance in ethylene cracking furnaces.2. BACKGROUND AND DESCRIPTION OF THE RELATED ART

[0002] Ethylene production continues to grow and has replaced acetylene for many applications. Ethylene production occurs mainly through pyrolysis which is the thermal cracking of various hydrocarbon streams in the presence of steam. The heat transfer in the radiant section of a thermal cracking furnace is critical. Cracking furnaces present both burner design and operating challenges in comparison to typical process heaters. The thermal cracking of hydrocarbons in the radiant section process tubes of a cracking furnace occurs at a higher temperature compared to most other refinery or chemical processes. In order to crack hydrocarbons in the presence of steam, the temperature of the combustion p...

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Embodiment Construction

[0030]The devices and methods discussed herein are merely illustrative of specific manners in which to make and use this invention and are not to be interpreted as limiting in scope.

[0031]While the devices and methods have been described with a certain degree of particularity, it is to be noted that many modifications may be made in the details of the construction and the arrangement of the devices and components without departing from the spirit and scope of this disclosure. It is understood that the devices and methods are not limited to the embodiments set forth herein for purposes of exemplification.

[0032]As shown in the drawings and understood by those skilled in the art, the burner assembly may be associated with a furnace or other heating applications to generate heat in a petroleum refinery, petro-chemical plant, or other applications.

[0033]Referring now to FIG. 1, a perspective view of a prior art burner design currently used in low NOx cracking furnaces. The current state-...