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Dynamic burner reconfiguration and combustion system for process heaters and boilers

A combustion system, burner technology, applied in the field of systems, can solve problems such as insufficient to solve the purpose of reduction

Inactive Publication Date: 2006-12-06
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting process is not sufficient to address the NO x Reduce purpose

Method used

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  • Dynamic burner reconfiguration and combustion system for process heaters and boilers
  • Dynamic burner reconfiguration and combustion system for process heaters and boilers
  • Dynamic burner reconfiguration and combustion system for process heaters and boilers

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Embodiment Construction

[0048] The dynamic burner reconfiguration (DBR) of the present invention provides the ability to overcome the flame interaction and resulting high NO in highly fired intensity heaters and boilers. x new method. A single oxidant jet (or multiple oxidant jets) from an oxidant port in or near the center of the burner arrangement provides supplemental combustion air or a dynamic placement of oxidant to reduce the fuel-rich combustion effects of the combined flame and give Fuel-rich burner fuel stability.

[0049] Depending on the burner intensity, individual burner stoichiometry, and relative spacing, the flow rate of the oxidant from the oxidant port is carefully controlled. The oxidizer purges the central fuel-rich region, lowers peak flame temperature, and reduces thermal and rapid NO x forming speed. Furthermore, this arrangement allows for extended extreme loads by dynamically reconfiguring the burner. The benefits include better heat transfer to process tubes and reduced...

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PUM

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Abstract

A furnace combustion system includes a plurality of burners adapted to generate a plurality of flames and an oxidant port disposed between and surrounded by at least two of the burners. Each burner is spaced apart from another burner and adapted to combust a stream of a first fuel or an other fuel with a stream of a first oxidant or an other oxidant and to generate a flame. The oxidant port is adapted to transmit at least one jet of the first oxidant or the other oxidant axially between at least two of the flames. The at least one jet is transmitted from the oxidant port at a controlled flow rate. At least a portion of the first oxidant or the other oxidant in the jet is required to complete combustion of at least a portion of at least one stream of the first fuel or the other fuel.

Description

technical field [0001] The present invention relates to a method for reducing nitrogen (NO x ) and carbon monoxide (CO) emissions, and in particular to such systems and methods that interact with localized NO x Reduction (e.g. by fractional techniques) Conversely, production of NO x The overall (comprehensive) reduction of . Background technique [0002] Many process heaters and boilers have NO x Emissions compliance issues. For example, many vertical cylinder heaters produce an average of 100 ppm or more of NO x . The vast majority of these heaters are older designs and operate at extremely high flare levels (>500,000 Btu / Hr-ft2). Multiple burners in a heater are usually grouped in a tight combustion circle with a single flame coalescing at the center, which creates a high temperature, fuel-rich region. The integrated flame produces hot and rapid NO due to the incorporation of a fuel-rich region in the center of the heater x . [0003] Whereas in vertical heater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L7/00F23C5/00
CPCF23D14/32Y02E20/344F23C2201/101F23C7/02F23C7/008F23L2900/07007F23C6/047F23D14/22F23C5/28Y02E20/34F24H9/18
Inventor M·L·乔施X·J·李
Owner AIR PROD & CHEM INC