NOx reduction in combustion with concentrated coal streams and oxygen injection

Kobayashi, Hisashi; Bool, Lawrence E.; Snyder, William J.

Title: NOx reduction in combustion with concentrated coal streams and oxygen injection

Abstract

NOx formation in the combustion of solid hydrocarbonaceous fuel such as coal is reduced by obtaining, from the incoming feed stream of fuel solids and air, a stream having a ratio of fuel solids to air that is higher than that of the feed steam, and injecting the thus obtained stream and a small amount of oxygen to a burner where the fuel solids are combusted.

Inventors:: Kobayashi, Hisashi; Bool, III, Lawrence E.; Snyder, William J.

Issue Date:: 2004-03-02

Research Org.:: Praxair, Inc., Danbury, CT (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1174743

Patent Number(s):: 6699031

Application Number:: 10/194,828

Assignee:: Praxair Technology, Inc. (Danbury, CT)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS

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F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F23C2201/101 - in vertical direction, e.g. alternating lean and rich zones
F23C2201/20 - Burner staging
F23C2900/06041 - Staged supply of oxidant
F23C2900/99004 - Combustion process using petroleum coke or any other fuel with a very low content in volatile matters
F23C5/32 - to obtain rotating flames, i.e. flames moving helically or spirally
F23C6/045 - {with staged combustion in a single enclosure}
F23C6/047 - {with fuel supply in stages}
F23C7/004 - {using vanes}

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
F23D1/00 - Burners for combustion of pulverulent fuel
F23D14/24 - at least one of the fluids being submitted to a swirling motion
F23D2900/00006 - Liquid fuel burners using pure oxygen or O2-enriched air as oxidant
F23D2900/01001 - Pulverised solid fuel burner with means for swirling the fuel-air mixture

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23L - SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL
F23L2900/07006 - Control of the oxygen supply
F23L2900/07007 - using specific ranges of oxygen percentage
F23L7/007 - {Supplying oxygen or oxygen-enriched air}

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23N - REGULATING OR CONTROLLING COMBUSTION
F23N2237/08 - two or more different types of fuel simultaneously
F23N2237/28 - oxygen as pure oxydant

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E20/34 - Indirect CO2 mitigation, i.e. by acting on non CO2 directly related matters of the process, e.g. more efficient use of fuels

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DOE Contract Number:: FC26-00NT40756

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES

Citation Formats


                    Kobayashi, Hisashi, Bool, III, Lawrence E., and Snyder, William J.. NOx reduction in combustion with concentrated coal streams and oxygen injection.  United States: N. p., 2004. 
        Web.

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                    Kobayashi, Hisashi, Bool, III, Lawrence E., & Snyder, William J.. NOx reduction in combustion with concentrated coal streams and oxygen injection.  United States.

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                    Kobayashi, Hisashi, Bool, III, Lawrence E., and Snyder, William J.. Tue .  
        "NOx reduction in combustion with concentrated coal streams and oxygen injection".  United States.  https://www.osti.gov/servlets/purl/1174743.

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@article{osti_1174743,

  title        = {NOx reduction in combustion with concentrated coal streams and oxygen injection},

  author       = {Kobayashi, Hisashi and Bool, III, Lawrence E. and Snyder, William J.},

  abstractNote = {NOx formation in the combustion of solid hydrocarbonaceous fuel such as coal is reduced by obtaining, from the incoming feed stream of fuel solids and air, a stream having a ratio of fuel solids to air that is higher than that of the feed steam, and injecting the thus obtained stream and a small amount of oxygen to a burner where the fuel solids are combusted.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2004},

  month        = {3}

}

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Works referenced in this record:

Characteristics of single particle coal combustion
journal, January 1982

Timothy, L. D.; Sarofim, A. F.; Béer, J. M.
Symposium (International) on Combustion, Vol. 19, Issue 1
https://doi.org/10.1016/S0082-0784(82)80288-9

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Title: NOx reduction in combustion with concentrated coal streams and oxygen injection

Abstract

Citation Formats

Characteristics of single particle coal combustion journal, January 1982

Characteristics of single particle coal combustion
journal, January 1982