360MW unit SCR denitration system operation improvement simulation

Abstract

Abstract:

Based on a 360MW unit SCR denitration reactor and site operation data, simulation of ammonia injection improvement and fluid field improvement was carried out. The result indicated that inlet fluid field is nonuniform. Which obviously reflect at NOx distribution andvelocity field. By dividing control zone and adjusting ammonia injection quantity, ammonianitrogen ratio was reduced from 10.0% to under 1.5%. By improving deflector structure, the first layer catalytic inlet velocity field was notably improved. Which indicated that the flow field after ammonia injectiongrating doesn’t affect ammonianitrogen ratio. Ammonianitrogen ratio is determined by reactor inlet flue gas flow field and ammonia injection method.

Key words:

selective catalytic reduction (SCR), denitration, ammonia injection improvement, fluid field improvement, computational fluid dynamics (CFD)

LIANG Xiujin, ZHU Yue, WEI Hongge.

360MW unit SCR denitration system operation improvement simulation

[J]. Huadian Technology, 2017, 39(5): 70-73.

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360MW unit SCR denitration system operation improvement simulation

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