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Criteria for endothermic flare

asked May 11, 2014 in Process by keler01 (1,380 points)
What is the criteria for endothermic flare or fuel assisted flare?

1 Answer

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answered May 11, 2014 by cobiesmith (3,310 points) | selected Apr 21, 2015 by odadmin
 
Best answer

Gases to be flared must have sufficient calerofic fuel value for complete combustion. Generally calerofic fuel value of 200 to 250 Btu/ft3 is sufficient for complete combustion otherwise fuel must be added. Flares provided with external fuel to waste gas are known as endothermic or fuel assisted flares.

In some cases, even flaring waste gases having the necessary heat content will also require supplemental heat. If fuel-bound nitrogen is present, flaring ammonia with a heating value of 13,600 kJ/m3 (365 Btu/ft3) will require higher heat to minimize nitrogen oxides (NOx) formation. 


Reference: http://www.epa.gov/ttnchie1/ap42/

 

commented Apr 21, 2015 by odadmin (21,030 points)
Thanks you for the info

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