Nitrozen Oxide
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NITROGEN OXIDECaused By Localised High Flame Temperature and an O2 rich Environment (in the Fire Ball) during Ignition of volatile matter.(Initial Stages of Combustion)EffectsContributes to SmogDepletes the OZONE Layer
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NITROGEN OXIDETHERMAL NOXProduced From the Nitrogen Present in the Combustion AirAgents Responsible for Production of Thermal NOXIncreased Excess AirIncreased Flame TemperatureIncreased Time at High Temperature
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NITROGEN OXIDEFUEL NOXProduced From the Nitrogen Compounds in the FuelResponsible for significant part of Total NOX ProducedCan form at much Lower Temperature than Thermal NOX
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TECHNIQUES TO LOWER NOXOVER FIRE AIROFA Nozzles Divert approximately 20% of the total Combustion Air to a Burning Zone above the Fire BallIGNITION POINTBy moving the Ignition Point closer to the Coal Nozzles the Volatile matter will have more time to ignite before entering the Fire Ball
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EFFECT OF OVER FIRE AIR ON NOX PRODUCTION