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Oxy-Fuel Furnace and Method of Heating Material in an Oxy-Fuel Furnace

a technology of oxy-fuel furnace and oxy-fuel furnace, which is applied in the direction of combustion of lump and pulverulent fuel, combustion types, lighting and heating apparatuses, etc. it can solve the problems of increasing the potential for inconsistent or uneven heating, hot spots, and nox generation, and achieves uniform heating within the enclosure, increases convective heating, and increases the shape factor effect of nozzles

Inactive Publication Date: 2013-04-18
AIR PROD & CHEM INC
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  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a special design for an oxy-fuel furnace that uses high-speed oxy-fuel burners to increase convective heating and ensure even heating of the entire enclosure. The burners are angled at 15-75 degrees to create a vortex, which helps to improve the flow of air and fuel in the furnace. This design results in better heating efficiency and improved energy utilization.

Problems solved by technology

The lack of convective component is due to the low gas volumes and can increase the potential for inconsistent or uneven heating, hot spots, and the generation of NOx.
In contrast, air fuel combustion lacks efficiency of radiative heating because of N2-dilution.

Method used

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Embodiment Construction

[0019]Provided is an exemplary oxy-fuel furnace and method of heating material in an oxy-fuel furnace. Embodiments of the present disclosure increase the convective contribution of heat transfer in an oxy-fuel heating process, decrease the cycle time for achieving certain temperatures, increase efficiency, or combinations thereof.

[0020]Referring to FIGS. 1 through 5, according to an embodiment, an oxy-fuel furnace 100 includes at least two high-momentum oxy-fuel burners 102 and an enclosure 104 generally defining a combustion zone within the oxy-fuel furnace 100. The enclosure 104 is any suitable geometry and is defined by a furnace wall boundary 108. For example, in one embodiment, the enclosure 104 is a cuboid or generally cuboid geometry. In another embodiment, the enclosure 104 is a cylindrical or generally cylindrical geometry. The enclosure includes a central region, for example, defined by the burner axis of each of the burners 102, the burner axis being a line extending from...

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Abstract

An oxy-fuel furnace and method of heating material in an oxy-fuel furnace are disclosed. The method includes combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases, and maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace. The oxy-fuel burner arrangement includes a plurality of high momentum oxy-fuel burners arranged at an angle to generate the vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure, an angular velocity of greater than 0.07 radians per second, or a combination thereof. The furnace includes an oxy-fuel burner arrangement including at least two high momentum oxy-fuel burners having high shape factor nozzle geometries, and an enclosure. The vortex increases convective heating within the enclosure and uniformity of heating within the enclosure.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and benefit of U.S. Provisional Patent Application No. 61 / 471,900, filed Apr. 5, 2011, which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention is directed to systems and methods of heating materials. More specifically, the present invention is directed to oxy-fuel furnaces and methods of heating material by using oxy-fuel furnaces.[0003]Nitrogen oxides (NOx) are among the primary air pollutants emitted by combustion processes. Because NOx promotes the formation of harmful atmospheric reaction products that cause smog, air quality standards have been imposed by various government agencies to limit the amount of NOx that can be emitted into the atmosphere. As a result of the increasing environmental legislation in many countries and increasing global awareness of atmospheric pollution, modern combustion technology has been improved to reduce NOx emi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F23C5/32F23L7/00
CPCF23C3/006Y02E20/344F23L7/007F23C5/32Y02E20/34F23D14/58F23D91/00
Inventor BURAGINO, GREGORY J.GANGOLI, SHAILESH PRADEEPHE, XIAOYISLAVEJKOV, ALEKSANDAR GEORGI
Owner AIR PROD & CHEM INC
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