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Information Journal Paper

Title

INVESTIGATION OF GEOMETRY EFFECT ON REDUCTION OF NITROGEN OXIDE BY SELECTIVE NON CATALYTIC REDUCTION (SNCR) METHOD

Pages

  92-100

Abstract

 Industrial kilns and power plants with high consumption of fossil fuels play a significant role in the production of air pollutants. Nitrogen oxide is one of these pollutants. In the present work, effect of different geometries on NO reduction in stack of industrial kilns and power plants is investigated numerically based on a selective non catalytic reduction (SNCR) method. In SNCR method, the NO reacts with ammonia which is injected into the kiln stack at temperature range of about 1150-1350 K and nitrogen is formed. In this study, a cylindrical stack with 500 cm length and 5 cm diameter is chosen, similar to Ostberg’s experimental work. Four geometries for ammonia injection with one, two, and four nozzles and by a ring around the stack have been studied. Numerical simulation of NO reduction by SNCR method shows that injection with one nozzle has lower efficiency than other injection geometries. Also, effect of gas stack length on NO reduction has been investigated. The results show that increasing stack length has a significant effect on ammonia slip reduction phenomenon. To investigate the effect of ammonia injection nozzle angle on SNCR efficiency, nozzle angles between -75 to 75 degrees were analyzed. Results show that the efficiency of this phenomenon decreases by increasing absolute value of injection nozzle angle. Finally, effect of BAFFLE presence in mainstream has been studied. It is observed that the required time and length for reaction decrease due to better mixing.

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    APA: Copy

    SHAFA, MASOUD, MAZAHERI, KIUMARS, & ALIPOOR, ALIREZA. (2015). INVESTIGATION OF GEOMETRY EFFECT ON REDUCTION OF NITROGEN OXIDE BY SELECTIVE NON CATALYTIC REDUCTION (SNCR) METHOD. MODARES MECHANICAL ENGINEERING, 15(2), 92-100. SID. https://sid.ir/paper/179755/en

    Vancouver: Copy

    SHAFA MASOUD, MAZAHERI KIUMARS, ALIPOOR ALIREZA. INVESTIGATION OF GEOMETRY EFFECT ON REDUCTION OF NITROGEN OXIDE BY SELECTIVE NON CATALYTIC REDUCTION (SNCR) METHOD. MODARES MECHANICAL ENGINEERING[Internet]. 2015;15(2):92-100. Available from: https://sid.ir/paper/179755/en

    IEEE: Copy

    MASOUD SHAFA, KIUMARS MAZAHERI, and ALIREZA ALIPOOR, “INVESTIGATION OF GEOMETRY EFFECT ON REDUCTION OF NITROGEN OXIDE BY SELECTIVE NON CATALYTIC REDUCTION (SNCR) METHOD,” MODARES MECHANICAL ENGINEERING, vol. 15, no. 2, pp. 92–100, 2015, [Online]. Available: https://sid.ir/paper/179755/en

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